Step 7 · Restore Water and Check for Leaks

First, make sure the new angle stop is in the closed position (for a quarter-turn valve, the handle will be perpendicular to the pipe). Go back to the main water shutoff and turn it on *slowly* by rotating the handle counter-clockwise. This prevents a water hammer shock to your pipes. Return to the sink and use a flashlight and a dry paper towel to meticulously inspect the new valve. Wipe down the compression nut and supply line connection; the paper towel will make even a tiny bead of water obvious. If everything is dry, turn the handle on the new angle stop to the open position (parallel to the pipe). Turn on the faucet to bleed air from the line. Check one last time for any leaks around the valve stem and connections.

Tools and Materials

Panther Vision FLATEYE F-310 High Performance 310-Lumen Unround Flashlight CREE LED Multi Position Waterproof and Shockproof FL-6960WYPALL White 1-Ply Paper Towel Roll (950-Sheets per Roll) KCC05841