{"product_id":"rv-holding-tank-fittings-kit-sensors-black-grey-water","title":"Elkhart RV Parts - Universal Holding Tank Fittings Kit - Black \u0026 Grey Water - 4 Sensors - 3\" \u0026 1.5\" Couplers - Complete DIY Installation Kit","description":"\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #1d9bf0; padding: 16px; margin-bottom: 16px;\"\u003e\u003cspan style=\"color: #1d9bf0; font-weight: bold;\"\u003e✓ ElkhartRVParts.com - The Only Authorized Place for Elkhart Plastics Parts\u003c\/span\u003e\u003c\/div\u003e\u003cdiv style=\"background-color: #f3f4f6; border-left: 4px solid #10b981; padding: 16px; margin-bottom: 20px;\"\u003e\u003cspan style=\"color: #10b981; font-weight: bold;\"\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/span\u003e\u003c\/div\u003e\u003ch2\u003eComplete Universal Holding Tank Fittings Kit - Everything You Need for Professional Black \u0026amp; Grey Water Tank Installation\u003c\/h2\u003e\u003cp\u003eInstalling or customizing your RV holding tank has never been easier. This comprehensive universal fittings kit includes everything you need to outfit your black water or grey water tank with professional-grade fittings and accurate level sensors. Whether you're replacing a damaged tank, upgrading to a larger capacity, or building a custom RV system, this complete kit delivers OEM-quality components with detailed installation instructions that make the job straightforward for DIYers and professionals alike.\u003c\/p\u003e\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Horst Miracle Probe Sensors:\u003c\/strong\u003e Premium mini probe sensors (#A2A2) with hooded debris protection provide accurate 4-level monitoring (full, 3\/4, 1\/2, empty) so you always know your tank status\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 Probe Screen Covers:\u003c\/strong\u003e Protective covers (#311) shield sensors from debris and waste buildup, ensuring long-term accuracy and easy cleaning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMultiple Barbed Couplers:\u003c\/strong\u003e Includes 3x 1-1\/2\" ABS barbed couplers (#BI-B11150B) and 1x 3\" ABS barbed coupler (#BI-B1130B) for drain and vent connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatching Grommets:\u003c\/strong\u003e 3x 1-1\/2\" grommets (#BI-B1115) and 1x 3\" grommet (#BI-B113) create leak-proof seals for all fittings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works with most RV black water and grey water holding tanks from all major manufacturers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM-Grade Quality:\u003c\/strong\u003e Same components used by RV manufacturers during original production - proven reliability you can trust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Installation Guide:\u003c\/strong\u003e Detailed PDF instructions with step-by-step photos make installation simple (\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/ElkhartRVParts.com_Black_and_Grey_Water_Fitting_Kit_Installation.pdf?v=1739823077\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color: #dc2626; font-weight: bold;\"\u003eDownload Installation PDF\u003c\/a\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Choose This Universal Holding Tank Fittings Kit?\u003c\/h2\u003e\u003cp\u003eWhen you're investing in a new holding tank or repairing your existing system, the fittings you choose make all the difference between a leak-free installation that lasts for years and a frustrating project that requires constant repairs. This kit eliminates the guesswork by including every component you need in the correct sizes and quantities. The Horst Miracle Probe sensors are the industry standard for accuracy and durability, with hooded debris protection that prevents the false readings and sensor failures common with cheaper alternatives. The ABS barbed couplers and grommets create permanent, leak-proof connections that withstand the vibration and movement of RV travel without loosening or cracking. Whether you're a mobile RV technician outfitting customer tanks, a DIY enthusiast tackling your first tank installation, or an RV dealer preparing tanks for sale, this kit provides professional results with straightforward installation that doesn't require specialized tools or welding equipment.\u003c\/p\u003e\u003ch2\u003eCompare RV Tank Fittings Kits \u0026amp; Components\u003c\/h2\u003e\u003cp\u003eChoosing the right fittings for your RV tank project? Compare our complete kits and individual components:\u003c\/p\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;\"\u003eProduct\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eApplication\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eSensors Included\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left; border: 1px solid #e5e7eb;\"\u003eCouplers\/Grommets\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=\"border-left: 3px solid #dc2626; background-color: #fef2f2;\"\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eHolding Tank Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eBlack \u0026amp; Grey Water\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e4 sensors + covers\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e3x 1.5\", 1x 3\" sets\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eComplete holding tank installation\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\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003eFresh Water Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eFresh Water\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e4 sensors\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eMultiple sizes (1\/2\" to 2\")\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eFresh water tank installations\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/elkhart-rv-parts-universal-fresh-water-tank-fittings-kit-water-level-sensors\" style=\"color: #dc2626; font-weight: bold;\"\u003eView Fresh Kit\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003e3\" Barbed Coupler\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eHolding Tanks\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eIndividual 3\" coupler\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eReplacement or additional 3\" fittings\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/3-barb-x-hub-coupler-black-u300bc\" style=\"color: #dc2626; font-weight: bold;\"\u003eView 3\" Coupler\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003cstrong\u003e1.5\" Barbed Coupler\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eAll Tank Types\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eNone\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eIndividual 1.5\" coupler\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003eReplacement or additional 1.5\" fittings\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #e5e7eb;\"\u003e\u003ca href=\"https:\/\/elkhartrvparts.com\/products\/elkhart-plastics-1-5-barbed-hub-coupler-black-u150bc-rv-tank-fitting\" style=\"color: #dc2626; font-weight: bold;\"\u003eView 1.5\" Coupler\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: 16px;\"\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e This holding tank kit is optimized for black and grey water applications with the right mix of 1.5\" and 3\" fittings. For fresh water tanks, choose the Fresh Water Kit which includes multiple grommet sizes for universal compatibility.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number\/SKU:\u003c\/strong\u003e ERVP-HOLDINGTANKKIT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Elkhart RV Parts (OEM-grade components)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Black water and grey water holding tanks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.2 lbs (complete kit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBarcode\/UPC:\u003c\/strong\u003e 52243352\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHS Code:\u003c\/strong\u003e 391740\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's Included in the Kit\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e4x Probe Screen Covers (#311) - Enhanced sensor protection and accurate readings\u003c\/li\u003e\n\u003cli\u003e4x Horst Miracle Probe Mini Sensors (#A2A2) - With hooded debris protection\u003c\/li\u003e\n\u003cli\u003e3x 1-1\/2\" ABS Barbed Couplers (#BI-B11150B) - For vent and drain connections\u003c\/li\u003e\n\u003cli\u003e1x 3\" ABS Barbed Coupler (#BI-B1130B) - For main drain connection\u003c\/li\u003e\n\u003cli\u003e3x 1-1\/2\" Grommets (#BI-B1115) - Leak-proof seals for 1.5\" fittings\u003c\/li\u003e\n\u003cli\u003e1x 3\" Grommet (#BI-B113) - Leak-proof seal for 3\" fitting\u003c\/li\u003e\n\u003cli\u003eDetailed installation instructions with photos (\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/ElkhartRVParts.com_Black_and_Grey_Water_Fitting_Kit_Installation.pdf?v=1739823077\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color: #dc2626; font-weight: bold;\"\u003eDownload PDF\u003c\/a\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTools You'll Need (Not Included)\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e3\/8\" drill bit (for installing sensors)\u003c\/li\u003e\n\u003cli\u003e2-1\/2\" hole saw (for 1-1\/2\" grommets)\u003c\/li\u003e\n\u003cli\u003e4\" hole saw (for 3\" grommet)\u003c\/li\u003e\n\u003cli\u003eElectric or cordless drill\u003c\/li\u003e\n\u003cli\u003eSafety goggles\u003c\/li\u003e\n\u003cli\u003eTape measure\u003c\/li\u003e\n\u003cli\u003eDish soap or hand soap (for installation)\u003c\/li\u003e\n\u003cli\u003eDeburring tool (knife or sandpaper works too)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Overview\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eInstalling Grommets \u0026amp; Barbed Couplers:\u003c\/strong\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eMark tank exactly where you want fittings (double-check measurements)\u003c\/li\u003e\n\u003cli\u003eMake starter hole for hole saw\u003c\/li\u003e\n\u003cli\u003eCut tank hole with appropriate hole saw (2-1\/2\" or 4\")\u003c\/li\u003e\n\u003cli\u003eDeburr hole thoroughly for tight seal\u003c\/li\u003e\n\u003cli\u003ePush short end of grommet into hole until flush\u003c\/li\u003e\n\u003cli\u003eApply dish soap to barbed coupler and push into grommet until it snaps and locks\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eInstalling Level Sensors:\u003c\/strong\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eMark sensor positions at end of tank (keep finger-width from edges)\u003c\/li\u003e\n\u003cli\u003eStandard formation: Top center (full), middle-side (half), bottom corner (empty), bottom center (empty)\u003c\/li\u003e\n\u003cli\u003eDrill 3\/8\" holes and remove burrs\u003c\/li\u003e\n\u003cli\u003ePush probe sensor into hole, wiggle into place, twist nut to tighten\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cem\u003eFull detailed instructions with photos included in kit and available in \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/ElkhartRVParts.com_Black_and_Grey_Water_Fitting_Kit_Installation.pdf?v=1739823077\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color: #dc2626; font-weight: bold;\"\u003edownloadable PDF format\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eProfessional Spin Weld Installation Available\u003c\/h2\u003e\u003cp\u003eDon't want to tackle this as a DIY project? We offer professional custom spin weld installation services! See our \u003ca href=\"https:\/\/elkhartrvparts.com\/products\/custom-fittings-install-service-we-will-spin-weld-into-tank-you-are-purchasing-today-up-to-5-parts\" style=\"color: #dc2626; font-weight: bold;\"\u003ecustom installation options here\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose our custom tank welding process?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Certified Application:\u003c\/strong\u003e Same process used by RV manufacturers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent Leak-Proof:\u003c\/strong\u003e Spin welding eliminates seams and voids at stress points\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple QC Check:\u003c\/strong\u003e Impact proof, air tight, and water tight testing on every tank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Results:\u003c\/strong\u003e Get it right the first time with our trained technicians\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\u003cp\u003eThis kit works with most RV black water and grey water holding tanks. Looking for related components? Browse our complete selection of \u003ca href=\"https:\/\/elkhartrvparts.com\/collections\/rv-tank-fittings\" style=\"color: #dc2626; font-weight: bold;\"\u003eRV Tank Fittings\u003c\/a\u003e. For fresh water tank installations, check out our \u003ca href=\"https:\/\/elkhartrvparts.com\/products\/elkhart-rv-parts-universal-fresh-water-tank-fittings-kit-water-level-sensors\" style=\"color: #dc2626; font-weight: bold;\"\u003eUniversal Fresh Water Tank Fittings Kit\u003c\/a\u003e. Need individual replacement components? We stock \u003ca href=\"https:\/\/elkhartrvparts.com\/products\/3-barb-x-hub-coupler-black-u300bc\" style=\"color: #dc2626; font-weight: bold;\"\u003e3\" barbed couplers\u003c\/a\u003e and \u003ca href=\"https:\/\/elkhartrvparts.com\/products\/elkhart-plastics-1-5-barbed-hub-coupler-black-u150bc-rv-tank-fitting\" style=\"color: #dc2626; font-weight: bold;\"\u003e1.5\" barbed couplers\u003c\/a\u003e separately.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need the holding tank kit or fresh water kit?\u003c\/strong\u003e\u003cbr\u003eThis holding tank kit is designed for black water and grey water tanks with the right mix of 1.5\" and 3\" fittings for typical waste tank configurations. The fresh water kit includes multiple grommet sizes (1\/2\" to 2\") for potable water applications. Choose based on your tank type.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install this kit myself or do I need professional help?\u003c\/strong\u003e\u003cbr\u003eMost DIYers with basic tools and mechanical skills can complete this installation following our detailed instructions. The process involves drilling holes, installing grommets, and mounting sensors - no welding required. For permanent leak-proof installation, consider our professional spin weld service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill these sensors work with my existing tank monitor panel?\u003c\/strong\u003e\u003cbr\u003eThe Horst Miracle Probe sensors are compatible with most standard RV tank monitoring systems. Verify your monitor panel accepts standard probe-style sensors before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's the difference between barbed couplers and threaded fittings?\u003c\/strong\u003e\u003cbr\u003eBarbed couplers use grommets to create leak-proof seals and connect to flexible hose with hose clamps. They're easier to install than threaded fittings and don't require pipe thread sealant. The barbed design grips hose securely for vibration-resistant connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow accurate are the Horst Miracle Probe sensors?\u003c\/strong\u003e\u003cbr\u003eHorst Miracle Probes are industry-standard sensors known for accuracy and reliability. The hooded debris protection prevents false readings from waste buildup, and the screen covers provide additional protection for long-term accuracy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I add more sensors than what's included in the kit?\u003c\/strong\u003e\u003cbr\u003eYes! You can purchase additional sensors separately if you want more monitoring points. The standard 4-sensor configuration (full, 3\/4, 1\/2, empty) works well for most applications.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\u003cp\u003eAs the only authorized dealer for Elkhart Plastics and CPI components, we guarantee 100% authentic OEM-grade parts - never knockoffs or inferior substitutes. This kit includes the same components used by RV manufacturers during original production. We maintain deep inventory for fast shipping, provide expert technical support, and offer professional spin weld installation services for customers who want permanent, leak-proof results. Our team understands RV tank systems and can help you select the right components for any installation or repair project.\u003c\/p\u003e\u003cdiv style=\"background-color: #fef2f2; border-left: 4px solid #dc2626; padding: 16px; margin: 24px 0;\"\u003e\u003cp style=\"margin: 0; font-weight: bold; color: #dc2626;\"\u003eReady to complete your RV holding tank installation with professional-grade fittings and accurate level monitoring? Order this complete kit now for fast shipping and get everything you need in one package. Questions about installation or compatibility? Our AI Live Chat has deep product knowledge and can help you with technical guidance and fitment questions.\u003c\/p\u003e\u003c\/div\u003e","brand":"Elkhart RV Parts","offers":[{"title":"Default Title","offer_id":42136552243352,"sku":"ERVP-HOLDINGTANKKIT","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/C5643B1E-5155-4602-AAAB-08E7965A1613.jpg?v=1739821925","url":"https:\/\/elkhartrvparts.com\/en-ca\/products\/rv-holding-tank-fittings-kit-sensors-black-grey-water","provider":"Elkhart RV Parts","version":"1.0","type":"link"}