{"title":"CPI Flush Fittings","description":"CPI flush spinweld fittings.","products":[{"product_id":"rv-tank-fittings1-2-flush-fitting-1-1-8-hole-size","title":"1\/2\"  FPT Flush Fitting 1 1\/8\" Hole Size Part # 83-LL","description":"\u003cp\u003e1\/2\" FPT (threaded) Flush Fitting (Cut hole size:1 1\/8\")\u003c\/p\u003e\n\u003cp\u003eCPI Part # 83 (500103)\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":32789635235899,"sku":"83-LL","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/rv-tank-fittings1-2-flush-fitting-1-1-8-hole-size-shopify-1.jpg?v=1779181165"},{"product_id":"cpi-1-1-4-flush-fpt-spinweld-fitting-membrane-55m","title":"CPI - 1 1\/4\" Flush FPT Spinweld Fitting w\/Membrane 2\" Hole Size Part # 55M","description":"\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 15px; margin-bottom: 15px;\"\u003e\u003cp style=\"margin: 0; color: #1d9bf0; font-weight: bold;\"\u003e\u003cstrong\u003e✓ ElkhartRVParts.com - The Only Authorized Place for CPI Parts\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 15px; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0; color: #10b981; font-weight: bold;\"\u003e\u003cstrong\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eCPI 1 1\/4\" Flush FPT Spinweld Fitting w\/Membrane - Part # 55M (500153)\u003c\/h2\u003e\u003cp\u003eThe CPI Part # 55M is a professional-grade 1 1\/4 inch flush female pipe thread spinweld fitting designed specifically for RV fresh water and holding tank installations. This fitting includes an integrated membrane seal for superior leak protection and is engineered for 2 inch hole size applications. Trusted by RV manufacturers and service professionals, this authentic CPI fitting delivers reliable performance in demanding mobile environments.\u003c\/p\u003e\u003ch2\u003eWhy Choose This CPI Spinweld Fitting\u003c\/h2\u003e\u003cp\u003eThis flush-mount FPT spinweld fitting combines precision engineering with durable construction to provide long-lasting tank connections. The included membrane creates a watertight seal that prevents leaks and contamination, while the flush design sits cleanly against your tank surface for a professional installation. With a proven 4.9-star rating from verified customers, this fitting is the trusted choice for RV tank repairs and new installations.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Benefits\u003c\/h3\u003e\u003cp\u003ePremium membrane seal technology ensures leak-free operation in fresh water and holding tank applications. The 1 1\/4 inch female pipe thread accepts standard plumbing connections, while the spinweld installation method creates a permanent, vibration-resistant bond to your tank. The flush-mount design minimizes protrusion and reduces the risk of damage during travel. Manufactured by CPI (Custom Plastics), this fitting meets OEM specifications for quality and durability.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 55M, 500153\u003cbr\u003e\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1 1\/4 inch FPT (Female Pipe Thread)\u003cbr\u003e\u003cstrong\u003eFitting Style:\u003c\/strong\u003e Flush mount\u003cbr\u003e\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Spinweld\u003cbr\u003e\u003cstrong\u003eHole Size Required:\u003c\/strong\u003e 2 inches\u003cbr\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-grade plastic with integrated membrane\u003cbr\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e RV fresh water tanks, RV holding tanks\u003cbr\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e CPI (Custom Plastics)\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e 10 oz\u003c\/p\u003e\u003ch3\u003eCompatible Applications \u0026amp; Use Cases\u003c\/h3\u003e\u003cp\u003eThis versatile spinweld fitting is ideal for RV fresh water tank drain connections, holding tank outlet fittings, tank vent installations, and general plumbing connections requiring a 1 1\/4 inch female thread. The 2 inch hole size makes it compatible with standard RV tank installations. Perfect for motorhome repairs, travel trailer upgrades, fifth wheel maintenance, and camper restoration projects. Professional RV technicians and DIY enthusiasts rely on this fitting for permanent tank repairs and new construction.\u003c\/p\u003e\u003ch2\u003eCompare Similar Spinweld Fittings\u003c\/h2\u003e\u003cdiv style=\"overflow-x: auto; margin: 20px 0;\"\u003e\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e5e7eb;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color: #dc2626; color: white;\"\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eThread Size\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eStyle\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eHole Size\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eView Details\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #fef2f2; border-left: 4px solid #dc2626;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb; font-weight: bold;\"\u003ePart # 55M\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1 1\/4\" FPT\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eFlush w\/Membrane\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e2\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e55M \/ 500153\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLeak-proof tank connections\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Product\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003ePart # 55\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1 1\/4\" FPT\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eThreaded (No Membrane)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e2\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e55\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eStandard installations\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-4-fitting-2-hole-size\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Details →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003ePart # 57M\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1 1\/2\" FPT\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eFlush w\/Membrane\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e2 1\/4\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e57M\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLarger diameter needs\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-flush-with-membrane-2-1-4-hole-size\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Details →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003ePart # 56\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1 1\/2\" FPT\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eThreaded (No Membrane)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e2\"\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e56\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLarger standard fittings\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-fpt-fitting-2-hole-size\" style=\"color: #dc2626; text-decoration: none; font-weight: bold;\"\u003eView Details →\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 12px; margin-top: 15px;\"\u003e\u003cstrong\u003e💡 Helpful Tip:\u003c\/strong\u003e Choose membrane-style fittings (like Part # 55M) for critical connections where leak prevention is essential, such as fresh water tank drains and holding tank outlets. Standard threaded fittings work well for vent lines and less critical applications.\u003c\/p\u003e\u003ch3\u003eRelated Products \u0026amp; Complete Your Installation\u003c\/h3\u003e\u003cp\u003ePair this fitting with our complete selection of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/rv-tank-fittings\" style=\"color: #dc2626; font-weight: bold;\"\u003eRV tank fittings and parts\u003c\/a\u003e for a professional installation. Browse our full range of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/spinweld-parts\" style=\"color: #dc2626; font-weight: bold;\"\u003espinweld parts and tank fittings\u003c\/a\u003e to find compatible components for your RV plumbing system.\u003c\/p\u003e\u003ch3\u003eInstallation \u0026amp; Professional Support\u003c\/h3\u003e\u003cp\u003eSpinweld fittings require specialized installation equipment for proper bonding to tank surfaces. For installation guidance, technical specifications, or product compatibility questions, our AI Live Chat provides instant access to deep product knowledge and expert assistance. Get answers to your questions in real-time without waiting.\u003c\/p\u003e\u003ch2\u003eAuthentic CPI Quality You Can Trust\u003c\/h2\u003e\u003cp\u003eEvery CPI fitting sold through Elkhart RV Parts is 100% authentic OEM-grade product sourced directly from authorized suppliers. We stand behind the quality of every part with our commitment to verified authenticity and customer satisfaction. With an average rating of 4.9 stars from verified customers, this fitting has proven its reliability in real-world RV applications.\u003c\/p\u003e\u003ch3\u003eOrder with Confidence\u003c\/h3\u003e\u003cp\u003eFast shipping, responsive customer service, and authentic parts make Elkhart RV Parts your trusted source for RV tank fittings and plumbing components. Order your CPI Part # 55M flush FPT spinweld fitting today and experience the difference that quality parts make in your RV maintenance and repair projects.\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":32789642379323,"sku":"55M\/500153","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/cpi-1-1-4-flush-fpt-spinweld-fitting-membrane-55m-shopify-1.jpg?v=1779178918"},{"product_id":"rv-tank-fittings1-4-flush-fitting-1-2-hole-size","title":"1\/4\" Flush Spinweld Fitting 1\/2\" Hole Size Part # 84I","description":"\u003cp\u003e1\/4\" Flush Spinweld Fitting (1\/2\" Hole Size) \u003c\/p\u003e\n\u003cp\u003ePart # 84I (500154)\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":32789643690043,"sku":"84I","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/rv-tank-fittings1-4-flush-fitting-1-2-hole-size-shopify-1.jpg?v=1779181261"},{"product_id":"cpi-1-5-inch-flush-fpt-hd-spinweld-fitting-57hd","title":"CPI - 1-1\/2\" Flush FPT HD Spinweld Fitting - 2-1\/2\" Hole Size - Part # 57HD","description":"\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 15px; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0; color: #1d9bf0; font-weight: bold;\"\u003e✓ \u003cstrong\u003eElkhartRVParts.com - The Only Authorized Place for CPI Components\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 15px; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0; color: #10b981; font-weight: bold;\"\u003e✓ \u003cstrong\u003e100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eCPI 1-1\/2\" Flush FPT HD Spinweld Fitting - Heavy-Duty RV Tank Component\u003c\/h2\u003e\u003cp\u003eThe CPI 1-1\/2\" Flush FPT HD Spinweld Fitting (Part # 57HD) is a premium heavy-duty tank fitting designed specifically for RV fresh water and holding tank installations. This authentic Custom Plastics (CPI) component features robust construction that exceeds standard fitting specifications, making it the ideal choice for demanding RV applications where reliability and durability are essential.\u003c\/p\u003e\u003ch2\u003eWhy Choose This Heavy-Duty Spinweld Fitting\u003c\/h2\u003e\u003cp\u003eWhen you're installing or repairing RV tank fittings, choosing heavy-duty components ensures long-lasting performance and peace of mind on the road. This HD (Heavy-Duty) spinweld fitting from CPI is engineered with reinforced construction that withstands the vibration, temperature fluctuations, and stress of RV travel better than standard fittings. The flush-mount design provides a low-profile installation that maximizes interior tank space while the 1-1\/2\" female pipe thread connection ensures compatibility with standard RV plumbing components.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 57HD (CPI Part # 500501)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitting Size:\u003c\/strong\u003e 1-1\/2 inch Female Pipe Thread (FPT)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Size Required:\u003c\/strong\u003e 2-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Flush mount spinweld\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Heavy-Duty (HD) reinforced design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High-grade plastic polymer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Custom Plastics Inc. (CPI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 12 oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand New OEM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 57HD\/500501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e RV fresh water tanks, RV holding tanks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible RV Tank Applications\u003c\/h2\u003e\u003cp\u003eThis versatile 1-1\/2\" flush FPT fitting is designed for use in both fresh water and holding tank systems. The heavy-duty construction makes it particularly well-suited for high-use applications such as main tank drains, fill connections, and vent fittings where standard components may fail over time.\u003c\/p\u003e\u003cp\u003eIf you're building or repairing a complete RV tank system, consider these complementary CPI spinweld fittings:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-fpt-fitting-2-hole-size\"\u003e1-1\/2\" FPT Spinweld Fitting (Part # 56)\u003c\/a\u003e - Standard duty version for lighter applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-flush-with-membrane-2-1-4-hole-size\"\u003e1-1\/2\" Flush Spinweld Fitting w\/ Membrane (Part # 57M)\u003c\/a\u003e - Includes membrane for odor control\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/2-fpt-flush-spinweld-fitting-part-58\"\u003e2\" FPT Flush Spinweld Fitting (Part # 58)\u003c\/a\u003e - Larger size for high-flow applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-4-fitting-2-hole-size\"\u003e1-1\/4\" FPT Threaded Spinweld Fitting (Part # 55)\u003c\/a\u003e - Smaller size for vent lines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation and Use Cases\u003c\/h2\u003e\u003cp\u003eThe spinweld installation method creates a permanent, leak-proof bond between the fitting and your RV tank. This flush-mount design sits nearly flat against the tank surface, making it ideal for installations where interior clearance is limited or where a low-profile fitting is preferred for aesthetic reasons.\u003c\/p\u003e\u003ch3\u003eCommon Applications:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFresh water tank drain connections\u003c\/li\u003e\n\u003cli\u003eHolding tank drain fittings (black and gray water)\u003c\/li\u003e\n\u003cli\u003eTank fill port installations\u003c\/li\u003e\n\u003cli\u003eVent line connections\u003c\/li\u003e\n\u003cli\u003eTank sensor wire pass-throughs\u003c\/li\u003e\n\u003cli\u003eRV tank repairs and renovations\u003c\/li\u003e\n\u003cli\u003eCustom RV tank fabrication projects\u003c\/li\u003e\n\u003cli\u003eReplacement for worn or damaged fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompare 1-1\/2\" Spinweld Fittings\u003c\/h2\u003e\u003cdiv style=\"overflow-x: auto; margin: 20px 0;\"\u003e\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e5e7eb;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color: #dc2626; color: white;\"\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eConstruction\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eBest For\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eView Details\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1-1\/2\" FPT Spinweld\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e56\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eStandard duty\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eLight-duty applications, budget builds\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-fpt-fitting-2-hole-size\"\u003eView Product\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #fef2f2; border-left: 3px solid #dc2626;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003e1-1\/2\" Flush FPT HD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003e57HD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eHeavy-Duty (HD)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eHigh-stress applications, main drains\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Product\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: white;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e1-1\/2\" Flush w\/ Membrane\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e57M\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eStandard + membrane\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eHolding tanks needing odor control\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/rv-tank-fittings1-1-2-flush-with-membrane-2-1-4-hole-size\"\u003eView Product\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 15px; margin-top: 15px;\"\u003e\u003cstrong\u003eHelpful Tip:\u003c\/strong\u003e Choose the HD (Heavy-Duty) version for main tank drains, high-flow applications, or anywhere you need extra strength and durability. The standard version (Part # 56) works well for secondary connections and vent lines, while the membrane version (Part # 57M) is ideal for holding tank applications where odor control is important.\u003c\/p\u003e\u003ch2\u003eAuthentic CPI Quality You Can Trust\u003c\/h2\u003e\u003cp\u003eCustom Plastics Inc. (CPI) has been manufacturing premium RV tank components for decades, earning a reputation for quality and reliability in the RV industry. This 1-1\/2\" Flush FPT HD Spinweld Fitting represents the same level of craftsmanship and engineering that RV manufacturers trust for factory installations.\u003c\/p\u003e\u003ch3\u003eWhat Sets This HD Fitting Apart:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReinforced heavy-duty construction for extended service life\u003c\/li\u003e\n\u003cli\u003ePrecision-molded threads for leak-free connections\u003c\/li\u003e\n\u003cli\u003eUV-resistant material that won't degrade in sunlight\u003c\/li\u003e\n\u003cli\u003eChemical-resistant polymer suitable for all tank types\u003c\/li\u003e\n\u003cli\u003eFlush-mount design maximizes usable tank capacity\u003c\/li\u003e\n\u003cli\u003e2-1\/2\" hole size standard for easy installation\u003c\/li\u003e\n\u003cli\u003eCompatible with all standard 1-1\/2\" NPT plumbing components\u003c\/li\u003e\n\u003cli\u003eTested to withstand RV travel vibration and stress\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat is the difference between the HD and standard 1-1\/2\" fittings?\u003c\/h3\u003e\u003cp\u003eThe HD (Heavy-Duty) version features reinforced construction with thicker walls and enhanced structural integrity compared to the standard Part # 56. This makes it ideal for high-stress applications like main tank drains where durability is critical.\u003c\/p\u003e\u003ch3\u003eWhat size hole do I need to drill for this fitting?\u003c\/h3\u003e\u003cp\u003eThis fitting requires a 2-1\/2 inch diameter hole for proper installation. The spinweld process creates a permanent bond between the fitting and the tank material.\u003c\/p\u003e\u003ch3\u003eCan this fitting be used on both fresh water and holding tanks?\u003c\/h3\u003e\u003cp\u003eYes, this CPI fitting is designed for use on both fresh water tanks and holding tanks (black and gray water). The chemical-resistant material is suitable for all RV tank applications.\u003c\/p\u003e\u003ch3\u003eIs this a flush mount or raised fitting?\u003c\/h3\u003e\u003cp\u003eThis is a flush-mount fitting, meaning it sits nearly flat against the tank surface with minimal protrusion into the tank interior. This design maximizes usable tank capacity.\u003c\/p\u003e\u003ch3\u003eWhat does FPT mean?\u003c\/h3\u003e\u003cp\u003eFPT stands for Female Pipe Thread. This fitting has internal (female) threads that accept standard 1-1\/2\" male NPT pipe fittings, valves, or adapters.\u003c\/p\u003e\u003ch3\u003eHow do I install a spinweld fitting?\u003c\/h3\u003e\u003cp\u003eSpinweld fittings require a specialized spin welding tool that rotates the fitting at high speed to generate friction heat, melting the plastic and creating a permanent bond with the tank. This is typically done during tank manufacturing or by professional tank fabricators.\u003c\/p\u003e\u003ch2\u003eCustomer Reviews Highlight Quality and Performance\u003c\/h2\u003e\u003cp\u003eWith an impressive 5.0-star rating from 8 verified customer reviews, this CPI fitting has earned high marks for quality, fitment, and value. Customers consistently praise the heavy-duty construction, perfect fit, and fast shipping. Many reviewers mention successful use in RV renovation projects and tank repair applications.\u003c\/p\u003e\u003ch2\u003eOrder Your Authentic CPI Fitting Today\u003c\/h2\u003e\u003cp\u003eWhether you're building a custom RV tank system, repairing existing tanks, or upgrading to heavy-duty components, this CPI 1-1\/2\" Flush FPT HD Spinweld Fitting delivers the quality and reliability you need. Fast shipping, authentic OEM quality, and expert support make Elkhart RV Parts your trusted source for RV tank fittings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNeed help selecting the right fitting for your project?\u003c\/strong\u003e Use our AI Live Chat for deep product knowledge and expert assistance with compatibility questions.\u003c\/p\u003e\u003cp style=\"background-color: #f3f4f6; border-left: 4px solid #dc2626; padding: 15px; margin-top: 20px;\"\u003e\u003cstrong\u003eReady to upgrade to heavy-duty quality?\u003c\/strong\u003e Add this authentic CPI 1-1\/2\" Flush FPT HD Spinweld Fitting to your cart now and experience the difference that professional-grade components make.\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":32789644771387,"sku":"57HD\/500501","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/cpi-1-5-inch-flush-fpt-hd-spinweld-fitting-57hd-shopify-1.jpg?v=1779179475"},{"product_id":"rv-tank-fittings1-1-2-flush-with-membrane-2-1-4-hole-size","title":"1-1\/2\" Flush Spinweld Fitting w\/ Membrane - Part # 57M","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e1-1\/2\" FPT Flush Spinweld Fitting with Membrane\u003c\/span\u003e (2 1\/4\" Hole Size) \u003c\/p\u003e\n\u003cp\u003eCustom Plastics Part # 57M (500496)  \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSpin Weld Fitting for RV Fresh Water and Holding Tanks\u003c\/span\u003e\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":32789645393979,"sku":"57M\/500496","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/rv-tank-fittings1-1-2-flush-with-membrane-2-1-4-hole-size-shopify-1.jpg?v=1779181284"},{"product_id":"3-flush-spinweld-fitting-3-7-8-hole-size-part-60","title":"3\" Flush Spinweld Fitting 3-7\/8\" Hole Size Part # 60","description":"\u003cp\u003e3\" Flush Spinweld Fitting (3-7\/8\" Hole Size)\u003c\/p\u003e\n\u003cp\u003ePart # 60 (500115) \u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":41646563885208,"sku":"60","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/3-flush-spinweld-fitting-3-7-8-hole-size-part-60-shopify-1.jpg?v=1779178611"},{"product_id":"3-flush-fitting-3-7-8-hole-size-part-60m","title":"3\" Flush Fitting 3-7\/8\" Hole Size Part # 60M","description":"\u003cp\u003e3\" Flush Fitting (3-7\/8\" Hole Size)\u003c\/p\u003e\n\u003cp\u003ePart # 60M (500116)\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":41646585708696,"sku":"60M","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/3-flush-fitting-3-7-8-hole-size-part-60m-shopify-1.jpg?v=1779178501"},{"product_id":"3-4-flush-fitting-1-3-8-hole-size-part-79","title":"3\/4\" FPT Flush Spinweld Fitting 1-3\/8\" Hole Size\" Part # 79LL","description":"\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e3\/4\" FPT Flush Spinweld Fitting (1-3\/8\" Hole Size\")\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationSubdued_1segu\" data-mce-fragment=\"1\"\u003ePart # 79 LL\u003c\/span\u003e\u003c\/div\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":41646678081688,"sku":"79","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/3-4-flush-fitting-1-3-8-hole-size-part-79-shopify-1.jpg?v=1779177975"},{"product_id":"3-flush-hd-fitting-4-hole-size-part-60-hd","title":"3\" Flush HD Fitting 4\" Hole Size Part # 60HD","description":"\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationStrong_rpyvj\" data-mce-fragment=\"1\"\u003e3\" Flush HD Fitting (4\" Hole Size)\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-mce-fragment=\"1\"\u003e\u003cspan class=\"Polaris-TextStyle--variationSubdued_1segu\" data-mce-fragment=\"1\"\u003ePart # 60HD SKU: 500349\u003c\/span\u003e\u003c\/div\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":41646769537176,"sku":"60HD","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/3-flush-hd-fitting-4-hole-size-part-60-hd-shopify-1.jpg?v=1779178513"},{"product_id":"2-fpt-flush-spinweld-fitting-part-58","title":"2\" FPT Flush Spinweld Fitting - Part # 58","description":"\u003cp\u003e2\" FPT Flush Spinweld Fitting \u003c\/p\u003e\n\u003cp\u003ePart # 58 (500112)\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":41659637006488,"sku":"58","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/2-fpt-flush-spinweld-fitting-part-58-shopify-1.jpg?v=1779177871"},{"product_id":"3-flush-fitting-3-7-8-hole-size-part-60b","title":"3\" Flush Fitting 3-7\/8\" Hole Size Part # 60B","description":"\u003cp\u003e3\" Flush Fitting - Black (3-7\/8\" Hole Size)\u003c\/p\u003e\n\u003cp\u003ePart # 60B\u003c\/p\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":42705264345240,"sku":"60B","price":4.99,"currency_code":"USD","in_stock":true}]},{"product_id":"cpi-3-8-fpt-flush-spinweld-fitting-82","title":"CPI - 3\/8\" FPT Flush Spinweld Fitting - Female Pipe Thread - Part #82","description":"\u003cp\u003e\u003cstrong\u003eThe 3\/8\" FPT flush spinweld fitting\u003c\/strong\u003e is the small but critical threaded connection used when an RV tank plumbing setup needs a clean flush-mount female port. CPI Part #82 gives you a 3\/8\" Female Pipe Thread connection in a flush spinweld style, making it a practical choice for tank builds, tank repairs, and replacement plumbing points where a threaded fitting is required.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCPI 3\/8\" FPT flush spinweld fitting\u003c\/li\u003e\n  \u003cli\u003eFemale Pipe Thread (FPT) connection\u003c\/li\u003e\n  \u003cli\u003eFlush-mount fitting style for low-profile tank installations\u003c\/li\u003e\n  \u003cli\u003eSpinweld design for permanent installation into compatible plastic tanks\u003c\/li\u003e\n  \u003cli\u003ePart #82 \/ SKU 82\u003c\/li\u003e\n  \u003cli\u003eUseful for RV tank plumbing repairs, replacements, and custom builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose This CPI 3\/8\" FPT Flush Spinweld Fitting?\u003c\/h2\u003e\n\u003cp\u003eWhen you need a small threaded tank connection, using the right fitting matters. This CPI flush spinweld fitting gives you a 3\/8\" Female Pipe Thread connection without a bulky raised profile, which helps when space is tight or when you want a cleaner finished tank surface. It is also a better choice than improvising with the wrong size fitting and ending up with leaks, poor thread engagement, or an awkward plumbing layout.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ch2\u003eCompare CPI Flush Spinweld Fittings\u003c\/h2\u003e\n  \u003cp\u003eNot sure which CPI tank fitting size is right for your project? Here is a quick comparison of nearby flush FPT options:\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"background:#dc2626; color:white;\"\u003e\n        \u003cth style=\"padding:10px; border:1px solid #e5e7eb; text-align:left;\"\u003eModel\u003c\/th\u003e\n        \u003cth style=\"padding:10px; border:1px solid #e5e7eb; text-align:left;\"\u003eThread Size\u003c\/th\u003e\n        \u003cth style=\"padding:10px; border:1px solid #e5e7eb; text-align:left;\"\u003eStyle\u003c\/th\u003e\n        \u003cth style=\"padding:10px; border:1px solid #e5e7eb; text-align:left;\"\u003eBest For\u003c\/th\u003e\n        \u003cth style=\"padding:10px; border:1px solid #e5e7eb; text-align:left;\"\u003eView Details\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-left:3px solid #dc2626; background:#fef2f2;\"\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCPI Part #82\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e3\/8\" FPT\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eFlush spinweld\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eSmall threaded RV tank plumbing connections\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Product\u003c\/strong\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCPI Part #83-LL\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e1\/2\" FPT\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eFlush fitting\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eStepping up to a slightly larger threaded port\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/rv-tank-fittings1-2-flush-fitting-1-1-8-hole-size\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCPI Part #79LL\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e3\/4\" FPT\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eFlush spinweld\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eLarger line connections that still need a flush profile\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/3-4-flush-fitting-1-3-8-hole-size-part-79\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCPI Part #55M\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e1-1\/4\" FPT\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eFlush spinweld with membrane\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eBigger threaded tank connections with added sealing help\u003c\/td\u003e\n        \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/cpi-1-1-4-flush-fpt-spinweld-fitting-membrane-55m\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Match the fitting to the thread size you actually need first, then choose flush vs. raised style based on your available clearance and tank layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e CPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 82\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size:\u003c\/strong\u003e 3\/8\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e FPT (Female Pipe Thread)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitting Style:\u003c\/strong\u003e Flush spinweld fitting\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e RV tank plumbing connection point\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eOne CPI 3\/8\" FPT flush spinweld fitting\u003c\/li\u003e\n  \u003cli\u003eNo additional hardware or installation tools included unless otherwise noted\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\n\u003cp\u003eIf you are comparing sizes or building out a larger tank plumbing setup, these related CPI fittings are good next options:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/en-ca\/products\/rv-tank-fittings1-2-flush-fitting-1-1-8-hole-size\"\u003eCPI 1\/2\" FPT Flush Fitting - Part #83-LL\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/en-ca\/products\/3-4-flush-fitting-1-3-8-hole-size-part-79\"\u003eCPI 3\/4\" FPT Flush Spinweld Fitting - Part #79LL\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/en-ca\/products\/cpi-1-1-4-flush-fpt-spinweld-fitting-membrane-55m\"\u003eCPI 1-1\/4\" Flush FPT Spinweld Fitting w\/Membrane - Part #55M\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does FPT mean on this CPI fitting?\u003c\/h3\u003e\n\u003cp\u003eFPT stands for Female Pipe Thread. That means this fitting is designed to accept a matching male threaded plumbing connection.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is a flush spinweld fitting?\u003c\/h3\u003e\n\u003cp\u003eA flush spinweld fitting is designed to be spin-welded into a compatible plastic tank so the fitting sits in a low-profile, flush-style position instead of standing proud like a raised fitting.\u003c\/p\u003e\n\n\u003ch3\u003eIs this the same as CPI Part #82?\u003c\/h3\u003e\n\u003cp\u003eYes. This listing is for CPI Part #82, a 3\/8\" FPT flush spinweld fitting.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use this if I need a larger threaded fitting?\u003c\/h3\u003e\n\u003cp\u003eNo. If your plumbing layout needs a larger thread size, you should move up to the correct fitting size instead of forcing reducers into the wrong base fitting.\u003c\/p\u003e\n\n\u003ch3\u003eDoes this fitting include installation tools?\u003c\/h3\u003e\n\u003cp\u003eNo. This product is the fitting itself only unless otherwise noted. Spinweld installation requires the proper tooling and a compatible tank material.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\n\u003cp\u003eWe carry hard-to-find RV tank fittings and plumbing parts that are easy to misidentify when you are buying from generic listings. That makes it easier to get the right CPI part the first time instead of losing time on returns or rework.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f3f4f6; border-left:4px solid #dc2626; padding:16px; margin-top:16px;\"\u003e\n  \u003cstrong\u003eNeed help matching the right CPI tank fitting?\u003c\/strong\u003e\u003cbr\u003e\n  Use our AI Live Chat to compare thread size, fitting style, and related options before you order.\n\u003c\/div\u003e","brand":"CPI","offers":[{"title":"Default Title","offer_id":49003572887704,"sku":"82","price":4.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/cpi-3-8-fpt-flush-spinweld-fitting-82-shopify-1.jpg?v=1779179871"}],"url":"https:\/\/elkhartrvparts.com\/en-ca\/collections\/cpi-flush-fittings.oembed","provider":"Elkhart RV Parts","version":"1.0","type":"link"}