{"product_id":"tankro-ro132-tnk-ro-water-filtration-expansion-tank-compact-4-gal","title":"tankRo RO132-TNK RO Water Filtration Expansion Tank - Compact 4 Gal","description":"\u003cp\u003eIn this review the tankRo RO132-TNK expansion tank is evaluated as a replacement or upgrade for under-sink reverse osmosis systems. The bottom line: it is a compact, NSF certified storage tank that delivers clean, neutral-tasting water and fits under most kitchen sinks, making it a practical choice for homeowners who need an easy-to-install RO storage solution. The single biggest reason to buy is the combination of a post-cured diaphragm for sterile water delivery and a durable steel shell that supports reliable day-to-day use.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNSF Certified:\u003c\/strong\u003e The tank and all components are certified for safety so users get contaminant-free storage for drinking water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e With dimensions of about 15 x 12 x 12 in the tank is designed to fit under most kitchen sinks and in tight cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Capacity:\u003c\/strong\u003e The reservoir holds up to 3.2 gallons of water on demand while the pre-pressurized air bladder helps maintain steady flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Deep-drawn steel domes and precision welding provide long lasting value and resistance to everyday wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e The tank ships with a tank ball valve and tank stand for straightforward replacement or initial installation using quick-connect fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeather Resistant Finish:\u003c\/strong\u003e A two-part epoxy primer and polyurethane coating improve durability for indoor or protected outdoor use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis tank is best for homeowners and renters who already have a reverse osmosis system and need a compact, reliable storage tank that fits under a sink. It appeals to people who prioritize certified components and sterile water delivery for drinking and cooking.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for those who need very high pressure delivery out of the box or who require a larger than 4 gallon capacity; professionals installing whole-house systems should look for larger commercial tanks or dedicated pressure boosting solutions.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWorks well as a replacement tank and is reported to be simple to install with the included ball valve and quick-connect design.\u003c\/li\u003e\n\u003cli\u003eQuality feel and construction, with customers praising value for money and durable materials.\u003c\/li\u003e\n\u003cli\u003eCompact footprint fits under most sinks while still supplying around 3.2 gallons of usable water.\u003c\/li\u003e\n\u003cli\u003eAll components are NSF certified, adding confidence in water safety.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report mixed experiences with water pressure, so results depend on the rest of the RO system and plumbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eEXPRESS WATER\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003etankRo RO132-TNK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity (tank reservoir)\u003c\/td\u003e\n\u003ctd\u003e3.2 gallons usable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall tank capacity\u003c\/td\u003e\n\u003ctd\u003e4 gallon (4 Gal nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e15 x 12 x 12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum working pressure\u003c\/td\u003e\n\u003ctd\u003e100 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded accessories\u003c\/td\u003e\n\u003ctd\u003eTank ball valve and tank stand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe tankRo RO132-TNK is a practical, well-built RO storage tank for most under-sink systems; it pairs certified sterile water delivery with compact dimensions and useful accessories. For anyone replacing a household RO tank or adding a compact storage vessel, it offers solid value, though those wanting stronger outlet pressure or larger capacity should evaluate system-wide options.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this tank fit under most kitchen sinks?\u003c\/strong\u003e\u003cbr\u003eYes, the compact 15 x 12 x 12 in footprint is designed to fit under most sinks and cabinets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much usable water does the tank hold?\u003c\/strong\u003e\u003cbr\u003eThe reservoir delivers about 3.2 gallons of usable filtered water; the remaining space contains the pre-pressurized air bladder.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it include a valve or stand?\u003c\/strong\u003e\u003cbr\u003eYes, the tank ships with a free tank ball valve and a tank stand for easier installation and replacement.\u003c\/p\u003e","brand":"EXPRESS WATER","offers":[{"title":"Default Title","offer_id":48746806935771,"sku":"B00Q798N8E","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/617s2_SsU8L._AC_SL1500.jpg?v=1778862484","url":"https:\/\/gearmusthave.com\/products\/tankro-ro132-tnk-ro-water-filtration-expansion-tank-compact-4-gal","provider":"GearMustHave","version":"1.0","type":"link"}