{"product_id":"ro-water-filtration-system-expansion-tank-6-gallon-compact-ro","title":"RO Water Filtration System Expansion Tank 6 Gallon - Compact RO","description":"\u003cp\u003eOur review of this RO water filtration expansion tank finds it to be a practical, no-nonsense upgrade for most under-sink reverse osmosis systems. The tank's biggest selling point is its combination of compact dimensions and sanitary materials: made from 100% food grade components, it stores filtered water without imparting odors or chemicals. Installation is straightforward thanks to the included 1\/4' tank ball valve and 1\/4' quick-connect compatibility, so homeowners replacing an old tank or adding extra on-demand capacity will see immediate benefits.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFood grade construction:\u003c\/strong\u003e The tank uses 100% food grade materials to keep stored water free from impurities and off-flavors for safe drinking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact size:\u003c\/strong\u003e With dimensions designed to fit under most sinks, the tank offers useful storage without requiring extra cabinet room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded tank valve:\u003c\/strong\u003e A free 1\/4' tank ball valve with quick-connect design simplifies replacement or installation and reduces plumbing time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable build:\u003c\/strong\u003e Deep-drawn steel domes and precision welding provide long-lasting structural integrity for the pressure vessel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable testing and warranty:\u003c\/strong\u003e The tank is rigorously tested for quality and comes with a 1-year warranty for added peace of mind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical capacity:\u003c\/strong\u003e Although marketed as 6 gallon, the working stored water is about 4.4 gallons, which delivers several fills of standard pitchers or quick top-ups to 5-gallon containers.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis tank is aimed at homeowners with an existing reverse osmosis under-sink system who need a dependable replacement or a compact expansion reservoir. It suits kitchens where cabinet space is limited but consistent on-demand filtered water is required, and for users who value food-safe materials and a simple installation.\u003c\/p\u003e\u003cp\u003eIt is less appropriate for commercial installations or very large households that require much higher continuous flow or larger storage capacity; those buyers should consider larger, dedicated storage solutions or commercial-grade pressure vessels.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMade from 100% food grade materials, helping preserve water taste and safety.\u003c\/li\u003e\n\u003cli\u003eEasy to install with the included 1\/4' tank ball valve and quick-connect design.\u003c\/li\u003e\n\u003cli\u003eCompact footprint fits under most sinks while still providing around 4.4 gallons of usable water.\u003c\/li\u003e\n\u003cli\u003eWell-built steel construction and a 1-year warranty offer confidence in durability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAdvertised as 6 gallon but usable capacity is about 4.4 gallons, which may confuse buyers expecting the full volume.\u003c\/li\u003e\n\u003cli\u003eNot suited for high-demand or commercial use where larger storage is required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003etankRo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e100% food grade materials with deep-drawn steel domes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable capacity\u003c\/td\u003e\n\u003ctd\u003eApproximately 4.4 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal dimensions\u003c\/td\u003e\n\u003ctd\u003e17.5 in x 12 in x 12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded accessory\u003c\/td\u003e\n\u003ctd\u003eFree 1\/4' tank ball valve with quick-connect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThis expansion tank is a sensible, value-oriented choice for residential RO systems: its \u003cstrong\u003efood grade construction\u003c\/strong\u003e, compact size and included valve make replacement or upgrade fast and reliable. For typical kitchen use and households seeking on-demand filtered water without extra space, it delivers good performance and durability at a fair price.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this tank fit under a standard kitchen sink?\u003c\/strong\u003e\u003cbr\u003eYes; the compact dimensions (17.5 in x 12 in x 12 in) are designed to fit under most sinks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the tank come ready to install?\u003c\/strong\u003e\u003cbr\u003eIt includes a 1\/4' tank ball valve with quick-connect to simplify setup, though basic plumbing tools may still be needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much water does it actually store?\u003c\/strong\u003e\u003cbr\u003eUsable stored water is about 4.4 gallons, despite the 6 gallon model designation.\u003c\/p\u003e","brand":"tankRo","offers":[{"title":"Default Title","offer_id":48251604959451,"sku":"B079Z19PP8","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61J7NkvwVAL._AC_SL1500.jpg?v=1770985550","url":"https:\/\/gearmusthave.com\/products\/ro-water-filtration-system-expansion-tank-6-gallon-compact-ro","provider":"GearMustHave","version":"1.0","type":"link"}