Protect your home and use an easy leak free Feed Water Adapter Valve. The valve is compatible with all standard ¼ in. tubing reverse osmosis and undersink filtration systems. The valve uses 1/2 in. and 3/8 in. threaded sizes to fit your feed water line and features an easy on/off flow stop knob. With a simple, durable, food grade design keeping your water flowing and your home safe is simple. Works with reverse osmosis water filtration systems, ice makers, RV water lines, marine and boat water lines, booster pumps, misting systems, refrigerator connection, coffee makers, water purifiers and more. The valve is made of temperature resistant polypropylene so it doesn't warp or affect the state of your water. The BPA free construction and lead free brass water way ensures that your system is kept completely pure. You may need additional tubing for installation. Fully compatible with ¼ in. quick connect tubing and half inch and ⅜ in. threaded water inflow connections. Get the most out of your filtration. Choose a reliable easy to use Adapter Valve: The Express Water Feed Water Adapter Valve PRTFAV3812 is the best in water purification.