RO Feed Water Adapter – 1/2" to 1/4" with Shut-Off Ball Valve

Keep your reverse osmosis system running smoothly with this compact, reliable feed water adapter. Designed to tap into your existing 1/2" cold or hot water supply line and convert it to a 1/4" feed line, this tee fitting makes RO system installation straightforward — no plumber required. The built-in shut-off ball valve lets you isolate your RO unit instantly for filter changes or maintenance, without disrupting your main water supply.

Key Features

Universal Compatibility: Fits standard 1/2" water supply lines and converts to 1/4" tubing — ideal for most under-sink reverse osmosis systems.
Integrated Shut-Off Ball Valve: Easily stop water flow to your RO unit for hassle-free filter replacements and maintenance.
Tee Design: Splits your existing supply line so your faucet and RO system can both be served from one connection — no extra plumbing required.
Hot & Cold Water Compatible: Works on both hot and cold water supply lines for flexible installation options.
Durable Construction: Built from quality materials to withstand typical household water pressure and everyday use.
Easy DIY Installation: Simple thread-and-tighten setup — no special tools needed.

Specifications

Inlet Size: 1/2"
Outlet Size: 1/4"
Valve Type: Shut-Off Ball Valve
Fitting Type: Tee (T-connector)
Compatible With: Cold & Hot Water Supply Lines, RO / Reverse Osmosis Systems
Country of Origin: Made in China

What's in the Box

1 × RO Feed Water Adapter Tee with Shut-Off Ball Valve (1/2" to 1/4")

Related Products You May Like

For more information on water quality and the benefits of reverse osmosis filtration, visit the U.S. Environmental Protection Agency – Drinking Water FAQs.

Learn more: Sterling Plumbing

Frequently Asked Questions

Q: What size supply line does this RO feed water adapter fit?

A: This adapter is designed to connect to a standard 1/2" water supply line (both cold and hot) and provides a 1/4" outlet to feed your reverse osmosis system. It is compatible with most under-sink RO installations.

Q: Do I need a plumber to install this RO tee adapter?

A: No — this fitting is designed for straightforward DIY installation. Simply attach the tee to your existing 1/2" supply line and connect your 1/4" RO tubing to the outlet. The shut-off ball valve allows you to control water flow to the RO unit independently.

Q: What is the shut-off ball valve used for?

A: The integrated shut-off ball valve allows you to stop the water supply to your reverse osmosis system whenever you need to change filters or perform maintenance — without turning off the main water supply to your faucet or home.

Q: Is this adapter compatible with both hot and cold water lines?

A: Yes, this adapter is rated for use on both hot and cold water supply lines, giving you flexible placement options during installation.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.