{"product_id":"ro-feed-water-adapter-1-2-to-1-4-3-8-inch-shut-off-ball-valve-under-sink-filter","title":"RO Feed Water Adapter 1\/2\" to 1\/4\" 3\/8\" with Shut-Off Valve","description":"\u003ch2\u003eRO Feed Water Adapter with Shut-Off Ball Valve – 1\/2\" to 1\/4\" \u0026amp; 3\/8\" Tee Connector\u003c\/h2\u003e\n\u003cp\u003eUpgrade your under-sink water filtration setup with this durable \u003cstrong\u003eRO Feed Water Adapter Tee\u003c\/strong\u003e. Designed to connect standard 1\/2\" cold or hot water supply lines to 1\/4\" or 3\/8\" tubing used in reverse osmosis and inline water filter systems, this adapter makes installation straightforward — no plumber required. The integrated \u003cstrong\u003eshut-off ball valve\u003c\/strong\u003e lets you control water flow to your filter independently, making maintenance and filter changes quick and hassle-free.\u003c\/p\u003e\n\n\u003cp\u003eCrafted from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e, this adapter is built to withstand everyday water pressure and resist corrosion over years of continuous use. Its compact tee design fits neatly beneath most kitchen sinks and works with both cold and hot water pipes.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Converts 1\/2\" water supply lines to 1\/4\" or 3\/8\" tubing — ideal for RO systems and under-sink filters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-In Shut-Off Ball Valve:\u003c\/strong\u003e Easily isolate water flow to your filter without shutting off the main supply\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e304 Stainless Steel Construction:\u003c\/strong\u003e Corrosion-resistant metal ensures a long-lasting, leak-free connection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTee Design:\u003c\/strong\u003e Allows simultaneous water flow to both your filter and regular tap — no interruption to normal use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy DIY Installation:\u003c\/strong\u003e Straightforward thread connections compatible with standard plumbing fittings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Use:\u003c\/strong\u003e Suitable for cold and hot water lines under kitchen or bathroom sinks\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Set:\u003c\/strong\u003e Comes as a full 1-set kit — everything you need for a clean, secure connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel \/ Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInlet Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/2 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutlet Size(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\/4 Inch \u0026amp; 3\/8 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShut-Off Ball Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnder-Sink RO \u0026amp; Inline Water Filter Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 Set (Adapter Tee + Shut-Off Valve)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off your main water supply before beginning installation.\u003c\/li\u003e\n  \u003cli\u003eDisconnect your existing supply line from the cold\/hot water valve beneath the sink.\u003c\/li\u003e\n  \u003cli\u003eThread the 1\/2\" inlet of the tee adapter onto the supply valve.\u003c\/li\u003e\n  \u003cli\u003eReconnect your original supply line to the tee's 1\/2\" pass-through port.\u003c\/li\u003e\n  \u003cli\u003eConnect your RO or filter tubing (1\/4\" or 3\/8\") to the appropriate outlet port.\u003c\/li\u003e\n  \u003cli\u003eUse the integrated ball valve to control water flow to the filter system.\u003c\/li\u003e\n  \u003cli\u003eTurn the main supply back on and check all connections for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Slight color variations may occur due to monitor brightness and lighting conditions. Please allow for minor measurement tolerances on all dimensions.\u003c\/p\u003e\n\n\u003cp\u003eFor more information on safe drinking water and filtration standards, visit the \u003ca href=\"https:\/\/www.epa.gov\/ground-water-and-drinking-water\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eU.S. Environmental Protection Agency – Drinking Water Resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What pipe sizes does this RO feed water adapter support?\u003c\/h4\u003e\n\u003cp\u003eA: This adapter features a 1\/2\" inlet and supports both 1\/4\" and 3\/8\" outlet connections, making it compatible with most standard reverse osmosis and under-sink inline water filter systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the shut-off ball valve easy to operate?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the built-in shut-off ball valve can be turned with a simple quarter-turn motion, allowing you to stop water flow to your filter instantly without touching the main supply valve. This is especially convenient when changing filter cartridges.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this adapter be used on both hot and cold water lines?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, this tee adapter is designed to work on both cold and hot water supply lines beneath kitchen or bathroom sinks, giving you flexible installation options.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this adapter compatible with standard plumbing threads?\u003c\/h4\u003e\n\u003cp\u003eA: This adapter uses standard threaded connections compatible with most residential plumbing fittings. We recommend using thread seal tape (PTFE tape) on all connections for a secure, leak-free fit.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What pipe sizes does this RO feed water adapter support?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This adapter features a 1\/2\\\" inlet and supports both 1\/4\\\" and 3\/8\\\" outlet connections, making it compatible with most standard reverse osmosis and under-sink inline water filter systems.\"}}, {\"@type\": \"Question\", \"name\": \"Is the shut-off ball valve easy to operate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — the built-in shut-off ball valve can be turned with a simple quarter-turn motion, allowing you to stop water flow to your filter instantly without touching the main supply valve. 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We recommend using thread seal tape (PTFE tape) on all connections for a secure, leak-free fit.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tools \u0026 Hardware\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/collections\/tools-hardware\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"RO Feed Water Adapter 1\/2\\\" to 1\/4\\\" 3\/8\\\" with Shut-Off Valve\", \"item\": \"https:\/\/kujrmc-0q.myshopify.com\/products\/ro-feed-water-adapter-1-2-to-1-4-3-8-inch-shut-off-ball-valve-under-sink-filter\"}]}\u003c\/script\u003e","brand":"Vue","offers":[{"title":"A","offer_id":48743074103488,"sku":"14:29#A","price":19.99,"currency_code":"USD","in_stock":true},{"title":"B","offer_id":48743074136256,"sku":"14:173#B","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0772\/9338\/7968\/files\/S449c4323d5354d8bbf92defc0e6b6c28k.webp?v=1786144742","url":"https:\/\/vueselect.com\/products\/ro-feed-water-adapter-1-2-to-1-4-3-8-inch-shut-off-ball-valve-under-sink-filter","provider":"Vue","version":"1.0","type":"link"}