{"product_id":"1-inch-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u100-w","title":"The Uniseal Warehouse - 1\" Uniseal Grommet - White - PVC Schedule 40 Pipe Tank Fitting - 1-3\/4\" Hole Saw - U100-W","description":"\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #1d9bf0;padding:16px;margin-bottom:12px;\"\u003e\u003cstrong style=\"color:#1d9bf0;\"\u003e✓ ElkhartRVParts.com - The Only Authorized Place for The Uniseal Warehouse\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #10b981;padding:16px;margin-bottom:24px;\"\u003e\u003cstrong style=\"color:#10b981;\"\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\u003c\/div\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e1\" Uniseal Grommet White (U100-W)\u003c\/strong\u003e by The Uniseal Warehouse delivers a permanent, leak-proof connection between 1\" PVC Schedule 40 pipe and your RV holding tank — no adhesives, no clamps, no mess. Just push the pipe through and the compression seal does the rest.\u003c\/p\u003e\n\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe ID (Inner Diameter):\u003c\/strong\u003e 1\" (25mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe OD (Outer Diameter):\u003c\/strong\u003e 1.315\" (33mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired Hole Saw Size:\u003c\/strong\u003e 1-3\/4\" (44mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Wall Thickness:\u003c\/strong\u003e Up to 3\/8\" (9mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e UV-Resistant Thermoplastic Elastomer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Pipe:\u003c\/strong\u003e PVC Schedule 40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 00850026906103\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold:\u003c\/strong\u003e Individually (Each)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the U100-W Uniseal Grommet?\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e1\" Uniseal Grommet U100-W\u003c\/strong\u003e steps up to a 1-3\/4\" hole saw — larger than the 1\/2\" and 3\/4\" sizes — making it the right choice for higher-flow drain, fill, and vent connections on RV tanks. The compression-seal design requires zero adhesives or sealants; the UV-resistant thermoplastic elastomer grips the pipe and tank wall to form a watertight bond that lasts for years.\u003c\/p\u003e\n\u003cp\u003eTrusted by RV manufacturers and repair shops nationwide, the \u003cstrong\u003eU100-W\u003c\/strong\u003e carries a perfect 5.0-star rating from verified buyers. It's the same OEM-grade fitting used in original RV production — now available direct from an authorized Uniseal Warehouse retailer.\u003c\/p\u003e\n\n\u003ch2\u003eCompare Uniseal Grommet Sizes\u003c\/h2\u003e\n\u003cp\u003eUse this table to match your pipe's outer diameter to the correct Uniseal grommet and hole saw size before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#dc2626;color:#fff;\"\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;\"\u003ePipe ID\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003ePipe OD\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eHole Saw Size\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #e5e7eb;text-align:left;\"\u003eMax Wall Thickness\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\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eU050-W\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1\/2\" (13mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e0.84\" (21mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1-1\/4\" (32mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/8\" (9mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eSmall sensors, vents, low-flow connections\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/1-2-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u050-w\" style=\"color:#dc2626;\"\u003eView U050-W\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eU075-W\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/4\" (19mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1.050\" (27mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1-1\/4\" (32mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/8\" (9mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eStandard RV tank vents, drains, fill lines\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/3-4-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u075-w\" style=\"color:#dc2626;\"\u003eView U075-W\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-left:3px solid #dc2626;background:#fef2f2;\"\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\n\u003cstrong\u003eU100-W\u003c\/strong\u003e (This Product)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1\" (25mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1.315\" (33mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1-3\/4\" (44mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/8\" (9mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eHigher-flow drains, fills, larger tank connections\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eCurrent Page\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eU150-W\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1-1\/2\" (38mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e1.900\" (48mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e2-1\/2\" (64mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/8\" (9mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eMain tank drain connections, large-diameter plumbing\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/1-1-2-uniseal-grommet-white-u150-w\" style=\"color:#dc2626;\"\u003eView U150-W\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003cstrong\u003eU200-W\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e2\" (50mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e2.375\" (60mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\" (76mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e3\/8\" (9mm)\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003eMain fill\/dump connections, large tank plumbing\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/en-ca\/products\/2-inch-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u200-w\" style=\"color:#dc2626;\"\u003eView U200-W\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#6b7280;margin-top:8px;\"\u003e\u003cem\u003eTip: Always measure your pipe's outer diameter (OD) — not the nominal pipe size — to confirm the correct Uniseal grommet size before ordering. The U100-W requires a larger 1-3\/4\" hole saw than the 1\/2\" and 3\/4\" sizes.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e U100-W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 00850026906103\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Compatibility:\u003c\/strong\u003e PVC Schedule 40, 1\" nominal pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Inner Diameter:\u003c\/strong\u003e 1\" (25mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Outer Diameter:\u003c\/strong\u003e 1.315\" (33mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired Hole Saw:\u003c\/strong\u003e 1-3\/4\" (44mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Tank Wall Thickness:\u003c\/strong\u003e 3\/8\" (9mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e UV-Resistant Thermoplastic Elastomer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Compression seal — no adhesives required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e Sold individually (Each)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOne (1) 1\" Uniseal Grommet — White (U100-W)\u003c\/li\u003e\n\u003cli\u003eManufacturer warranty against defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\n\u003cp\u003eNeed a different pipe size? Browse the full Uniseal Grommet lineup: \u003ca href=\"\/en-ca\/products\/1-2-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u050-w\" style=\"color:#dc2626;\"\u003e1\/2\" U050-W\u003c\/a\u003e, \u003ca href=\"\/en-ca\/products\/3-4-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u075-w\" style=\"color:#dc2626;\"\u003e3\/4\" U075-W\u003c\/a\u003e, \u003ca href=\"\/en-ca\/products\/1-1-2-uniseal-grommet-white-u150-w\" style=\"color:#dc2626;\"\u003e1-1\/2\" U150-W\u003c\/a\u003e, and \u003ca href=\"\/en-ca\/products\/2-inch-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u200-w\" style=\"color:#dc2626;\"\u003e2\" U200-W\u003c\/a\u003e. Browse our full \u003ca href=\"\/en-ca\/collections\/rv-tank-fittings\" style=\"color:#dc2626;\"\u003eRV Tank Fittings collection\u003c\/a\u003e for additional tank plumbing components.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat hole saw size do I need for the U100-W Uniseal Grommet?\u003c\/h3\u003e\n\u003cp\u003eThe U100-W requires a \u003cstrong\u003e1-3\/4\" (44mm) hole saw\u003c\/strong\u003e — note this is larger than the 1-1\/4\" hole saw used for the 1\/2\" and 3\/4\" Uniseal sizes. Always confirm your hole saw size before cutting.\u003c\/p\u003e\n\n\u003ch3\u003eIs the U100-W compatible with PVC Schedule 80 pipe?\u003c\/h3\u003e\n\u003cp\u003eThe U100-W is designed and rated for \u003cstrong\u003ePVC Schedule 40 pipe\u003c\/strong\u003e. Schedule 40 and Schedule 80 share the same outer diameter for 1\" nominal pipe (1.315\"), so it may physically fit, but we recommend using it as specified with Schedule 40 for optimal sealing performance.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I install a 1\" Uniseal grommet?\u003c\/h3\u003e\n\u003cp\u003eCut a 1-3\/4\" hole in your tank wall, smooth the edges, insert the grommet into the hole, then push your 1\" PVC pipe through the grommet. The compression seal forms automatically — no glue or sealant needed. Measure twice before cutting!\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the maximum tank wall thickness for the U100-W?\u003c\/h3\u003e\n\u003cp\u003eThe U100-W accommodates tank walls up to \u003cstrong\u003e3\/8\" (9mm) thick\u003c\/strong\u003e, which covers the vast majority of RV polyethylene holding tanks.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use this grommet for both fresh water and waste water tanks?\u003c\/h3\u003e\n\u003cp\u003eYes — the U100-W is suitable for fresh water, grey water, and black water holding tanks. The UV-resistant thermoplastic elastomer material is safe for potable water applications.\u003c\/p\u003e\n\n\u003ch3\u003eWhere can I buy the U100-W Uniseal Grommet?\u003c\/h3\u003e\n\u003cp\u003eElkhartRVParts.com is an authorized retailer of The Uniseal Warehouse products. Order directly here for guaranteed authentic parts with fast shipping.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\n\u003cp\u003eWe are an authorized dealer of The Uniseal Warehouse, meaning every U100-W grommet you purchase from us is 100% genuine OEM-grade. We stock authentic parts, ship fast, and back every order with our 30-day return policy. Our team knows RV plumbing — we're here to make sure you get the right part the first time.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f3f4f6;border-left:4px solid #dc2626;padding:16px;margin-top:24px;\"\u003e\n\u003cstrong style=\"color:#dc2626;\"\u003eReady to order?\u003c\/strong\u003e Add the U100-W to your cart today for fast shipping. Have a question about fitment or compatibility? Use our \u003cstrong\u003eAI Live Chat\u003c\/strong\u003e for instant answers from our RV parts experts.\n\u003c\/div\u003e","brand":"The Uniseal Warehouse","offers":[{"title":"Default Title","offer_id":42237042688152,"sku":"U100-W","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/1-inch-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u100-w-shopify-1.jpg?v=1779182826","url":"https:\/\/elkhartrvparts.com\/en-ca\/products\/1-inch-uniseal-grommet-white-pvc-schedule-40-tank-fitting-u100-w","provider":"Elkhart RV Parts","version":"1.0","type":"link"}