{"product_id":"icon-81-gallon-rv-fresh-water-tank-wt3644","title":"ICON - 81 Gallon RV Fresh Water Tank - 44 1\/2\" x 58\" x 7 3\/4\" - WT3644","description":"\n\u003cdiv style=\"background:#f3f4f6; border-left:4px solid #1d9bf0; padding:16px; margin-bottom:12px;\"\u003e\n \u003cstrong style=\"color:#1d9bf0;\"\u003e✓ ElkhartRVParts.com - The Only Authorized Place for ICON\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f3f4f6; border-left:4px solid #10b981; padding:16px; margin-bottom:12px;\"\u003e\n \u003cstrong style=\"color:#10b981;\"\u003e✓ 100% Verified Authentic OEM Grade Part\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe 81 gallon RV fresh water tank from ICON is built for RV owners replacing a cracked factory tank or planning a custom water layout around exact measurements. The WT3644 gives you a large-capacity, OEM-grade tank-only option without pre-installed fittings, probes, or sensors, so you can match the footprint first and finish the plumbing to your setup.\u003c\/p\u003e\n\u003cp\u003eIts low-profile 44 1\/2\" x 58\" x 7 3\/4\" design is especially useful when you have floor space available but limited height. If you need a blank RV fresh water tank that prioritizes capacity and layout flexibility, this is the style to look at first.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eICON WT3644 81 gallon RV fresh water tank for replacement or custom-install work.\u003c\/li\u003e\n  \u003cli\u003eMeasures 44 1\/2\" x 58\" x 7 3\/4\" for a wide, low-profile footprint.\u003c\/li\u003e\n  \u003cli\u003eBlank tank-only configuration with no fittings, probes, or sensors installed.\u003c\/li\u003e\n  \u003cli\u003eDurable roto-molded one-piece polyethylene construction.\u003c\/li\u003e\n  \u003cli\u003eIAPMO certified for quality and safety standards.\u003c\/li\u003e\n  \u003cli\u003eGood fit when you want to choose your own plumbing layout instead of working around pre-installed ports.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose ICON WT3644?\u003c\/h2\u003e\n\u003cp\u003eThis 81 gallon RV fresh water tank works well for buyers who care more about matching tank dimensions than buying a one-size-fits-all layout. Because WT3644 is a blank tank-only design, you can plan your own filler, vent, and plumbing approach around the space you actually have.\u003c\/p\u003e\n\u003cp\u003eThat makes this 81 gallon RV fresh water tank a smart option for custom builds, older RV tank replacement projects, and low-profile water storage applications where capacity still matters. It also removes the risk of paying for pre-installed fittings that do not line up with your rig.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n \u003ch2\u003eCompare Fresh Water Tanks\u003c\/h2\u003e\n \u003cp\u003eNot sure which RV fresh water tank is the right fit? Compare this ICON tank-only option against nearby capacities and footprints in our catalog.\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;\"\u003eModel\u003c\/th\u003e\n    \u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eCapacity\u003c\/th\u003e\n    \u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eDimensions\u003c\/th\u003e\n    \u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eBest For\u003c\/th\u003e\n    \u003cth style=\"padding:10px; border:1px solid #e5e7eb;\"\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\u003eICON WT3644 - Part WT3644\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e81 gallons\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e44 1\/2\" x 58\" x 7 3\/4\"\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eLarge-capacity blank tank for replacement jobs and custom plumbing layouts.\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;\"\u003eICON WT3555 - Part WT3555\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e75 gallons\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e50\" x 36\" x 10\"\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eSlightly lower capacity when you can accept more height and need a shorter footprint.\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/icon-fresh-water-tank-wt3555-50x36x10-75-gallons-tank-only\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n   \u003c\/tr\u003e\n   \u003ctr\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eICON WT3835 - Part 2010371\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e52 gallons\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e54\" x 45\" x 5 1\/2\"\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eLower-profile installations where height is tighter and full 81-gallon capacity is not required.\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/icon-fresh-water-tank-wt3835-54x45x5-5-52-gallons-2010371\"\u003eView Details\u003c\/a\u003e\u003c\/td\u003e\n   \u003c\/tr\u003e\n   \u003ctr\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eICON WT3676 - Part 2015555\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e106 gallons\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e66\" x 47 1\/2\" x 8\"\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eBigger-capacity builds with more floor space and a larger water reserve goal.\u003c\/td\u003e\n    \u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e\u003ca href=\"\/products\/icon-fresh-water-tank-wt3676-66x47-5x8-106-gallons-2015555\"\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 For RV fresh water tank selection, match length, width, and height before capacity. A slightly smaller tank that fits cleanly is usually better than a larger tank that forces plumbing compromises.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; font-size:14px; margin:0 0 20px 0;\"\u003e\n \u003ctbody\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eICON\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eWT3644\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eFresh Water Tank\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e81 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003e44 1\/2\" x 58\" x 7 3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eConfiguration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eTank only \/ blank tank\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eFittings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eNone included\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eProbes \/ Sensors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eNone included\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003ePolyethylene\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eRoto-molded, one piece\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eIAPMO certified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb; background:#f9fafb;\"\u003e\u003cstrong\u003eShipping\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:10px; border:1px solid #e5e7eb;\"\u003eLTL \/ freight\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x ICON WT3644 81 gallon RV fresh water tank\u003c\/li\u003e\n  \u003cli\u003eBlank tank configuration with no fittings installed\u003c\/li\u003e\n  \u003cli\u003eNo probes or sensors included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatible Models \u0026amp; Alternatives\u003c\/h2\u003e\n\u003cp\u003eIf you are comparing footprints, capacities, or low-profile alternatives, these verified in-store options are a good next step:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/icon-fresh-water-tank-wt3555-50x36x10-75-gallons-tank-only\"\u003eICON WT3555 75 Gallon Tank Only\u003c\/a\u003e for a smaller-capacity alternative with a shorter footprint.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/icon-fresh-water-tank-wt3835-54x45x5-5-52-gallons-2010371\"\u003eICON WT3835 52 Gallon Fresh Water Tank\u003c\/a\u003e for lower-profile applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/icon-fresh-water-tank-wt3676-66x47-5x8-106-gallons-2015555\"\u003eICON WT3676 106 Gallon Fresh Water Tank\u003c\/a\u003e for larger-capacity builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv style=\"margin:0 0 14px 0;\"\u003e\n\u003cstrong\u003eDoes this 81 gallon RV fresh water tank come with fittings, probes, or sensors?\u003c\/strong\u003e\u003cp style=\"margin:6px 0 0 0;\"\u003eNo. WT3644 is a blank tank-only listing, so fittings, probes, and sensors are not pre-installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 14px 0;\"\u003e\n\u003cstrong\u003eWhat are the dimensions of the ICON WT3644 tank?\u003c\/strong\u003e\u003cp style=\"margin:6px 0 0 0;\"\u003eThis RV fresh water tank measures 44 1\/2\" x 58\" x 7 3\/4\".\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 14px 0;\"\u003e\n\u003cstrong\u003eIs WT3644 a good choice for RV tank replacement?\u003c\/strong\u003e\u003cp style=\"margin:6px 0 0 0;\"\u003eYes, especially when you need to replace a damaged fresh water tank and must match the footprint closely before drilling or plumbing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 14px 0;\"\u003e\n\u003cstrong\u003eIs this a low-profile RV fresh water tank?\u003c\/strong\u003e\u003cp style=\"margin:6px 0 0 0;\"\u003eIt has a relatively low 7 3\/4\" height, which can help in installations where floor space is available but vertical room is limited.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin:0 0 14px 0;\"\u003e\n\u003cstrong\u003eHow do I know if this tank is the right fit for my RV?\u003c\/strong\u003e\u003cp style=\"margin:6px 0 0 0;\"\u003eCompare the exact length, width, height, and blank-tank configuration against your available space and planned plumbing layout before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhy Buy from Elkhart RV Parts?\u003c\/h2\u003e\n\u003cp\u003eElkhart RV Parts focuses on hard-to-find RV parts and replacement components that buyers actually need help identifying correctly. For products like WT3644, that matters because dimensions, configuration, and application are often more important than generic marketing copy.\u003c\/p\u003e\n\u003cp\u003eThis listing also keeps the important facts upfront: 81 gallon capacity, exact dimensions, blank tank-only configuration, and verified in-store alternatives. The product currently carries a 4.8 out of 5 review average from verified reviews on the store.\u003c\/p\u003e\n\u003cdiv style=\"background:#f3f4f6; border-left:4px solid #dc2626; padding:16px; margin-top:16px;\"\u003e\n \u003cstrong\u003eNeed help deciding if WT3644 is the right tank layout for your RV?\u003c\/strong\u003e\n \u003cdiv style=\"margin-top:8px;\"\u003eUse our AI Live Chat for quick help comparing dimensions, tank style, and alternative in-store options before you order.\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Icon Direct","offers":[{"title":"Default Title","offer_id":42716041642136,"sku":"14333","price":998.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0346\/2397\/9579\/files\/WT3644blank.jpg?v=1688072438","url":"https:\/\/elkhartrvparts.com\/products\/icon-81-gallon-rv-fresh-water-tank-wt3644","provider":"Elkhart RV Parts","version":"1.0","type":"link"}