{"product_id":"fresh-gray-water-holding-tank-combo-rv-camper-bpa-free","title":"Fresh Gray Water Holding Tank Combo - RV \u0026 Camper - BPA Free","description":"\u003cp\u003eIn this review of the Fresh Gray Water Holding Tank Combo, the bottom line is simple: this pair of rotationally molded tanks is aimed at RV, camper and trailer owners who need reliable, seamless storage for both fresh and gray water. The reviewer found the combination of a 16 gallon and a 21 gallon tank attractive for installations where space is limited but multiple capacities are required, and the single biggest reason to buy is the tanks' one piece, seam-free polyethylene construction that reduces the risk of leaks and blow-outs in mobile applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless construction:\u003c\/strong\u003e One piece rotational molding removes joints and seams, reducing the chance of burst or leakage over time in a moving vehicle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable polyethylene:\u003c\/strong\u003e High quality, stain and corrosion resistant material holds up to RV and marine environments without rusting or degrading quickly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort configuration:\u003c\/strong\u003e Each tank includes one 1.25 in water fill inlet and three 3\/8 in NPT connections so common hook-ups are quickly accessible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo sizes included:\u003c\/strong\u003e The combo provides a 16 gallon and a 21 gallon tank to suit mixed-capacity installs where both fresh and gray water containment is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBPA free:\u003c\/strong\u003e Materials are BPA free, making the fresh water tank appropriate for potable water use when installed and vented correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product is best for RV owners, concession trailer operators, food truck owners and horse trailer users who need replaceable or OEM-style freshwater and gray water tanks that fit within constrained compartments. Anyone who values a robust, non-metallic tank that resists staining and corrosion will appreciate this combo.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include users who require pressurized tanks or integrated sensors and fittings beyond the included ports, or installations that demand nonstandard connection sizes; the tanks are non-pressurized and must be vented as part of proper installation.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSeamless, one piece construction minimizes leak risk compared with multi-piece tanks.\u003c\/li\u003e\n\u003cli\u003eBPA free polyethylene offers resistance to stain, corrosion and rust and is suitable for potable water storage.\u003c\/li\u003e\n\u003cli\u003eThe combo of 16 and 21 gallon sizes provides flexibility for mixed fresh and gray water setups in tight spaces.\u003c\/li\u003e\n\u003cli\u003eMultiple factory ports, including a 1.25 in fill inlet and three 3\/8 in NPT connections, simplify common hookups.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNon-pressurized design requires proper venting and may not suit systems that expect pressurized tanks.\u003c\/li\u003e\n\u003cli\u003eFittings beyond the supplied ports may be required to match specific vehicle plumbing, so measuring before purchase is essential.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded tanks\u003c\/td\u003e\n\u003ctd\u003e16 gal and 21 gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e16 gal dimensions\u003c\/td\u003e\n\u003ctd\u003e24 in x 15 in x 10 in (excluding fittings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21 gal dimensions\u003c\/td\u003e\n\u003ctd\u003e39 in x 16 in x 8 in (excluding fittings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eRotationally molded high quality polyethylene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlets and connections\u003c\/td\u003e\n\u003ctd\u003eOne 1.25 in water fill inlet and three 3\/8 in NPT connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eOne piece seamless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotable use\u003c\/td\u003e\n\u003ctd\u003eBPA free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Fresh Gray Water Holding Tank Combo is a practical, value-oriented choice for RV and trailer owners who need durable, leak-resistant freshwater and gray water storage in a compact footprint. Its seamless polyethylene build, BPA free material and useful port selection make it a dependable replacement or OEM option when venting requirements and connection sizes are confirmed before purchase.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDo these tanks require venting?\u003c\/strong\u003e\u003cbr\u003eYes. These are non-pressurized tanks and must be vented as part of proper installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the tanks safe for drinking water?\u003c\/strong\u003e\u003cbr\u003eYes. The tanks are BPA free and intended for fresh water when installed correctly with appropriate fittings and venting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fittings are included?\u003c\/strong\u003e\u003cbr\u003eEach tank comes with one 1.25 in water fill inlet and three 3\/8 in NPT connections; additional adapters may be needed for specific plumbing.\u003c\/p\u003e","brand":"A.A","offers":[{"title":"Default Title","offer_id":48162425307355,"sku":"B07QY8RX37","price":181.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/41WWETM_9qL._AC_SL1002.jpg?v=1769176011","url":"https:\/\/gearmusthave.com\/products\/fresh-gray-water-holding-tank-combo-rv-camper-bpa-free","provider":"GearMustHave","version":"1.0","type":"link"}