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How to Replace the Angle Stop and Supply Line

These step-by-step instructions make it easy to replace the angle stop and supply line in a bathroom.

More in Plumbing

  • Time

    30 Minutes

  • Price Range

    $1 - $50

  • Difficulty



Step 1: Remove the Angle Stop

Disconnect the water line where it connects to the valve using a crescent wrench. Next, remove the angle stop -- use two wrenches, one to hold the compression nut and one to hold the angle stop. To loosen, remember to turn the compression nut, not the angle stop.

remove the angle stop

Step 2: Replace the Water Supply Line

Remove and replace the crimped water supply line. Use a stronger, reinforced supply line and add a new brass quarter turn angle valve.

Step 3: Reattach the new Line and Valve

To reattach the new supply line and angle valve, first remove the compression nut and slide it over the copper nipple. Replace the compression sleeve and tighten using two crescent wrenches -- one wrench holds the angle stop in place, the second wrench tightens the nut.

reattach new supply line and angle valve

Step 4: Remove the Stem

The stem is the valve that's controlled by the faucet handle. To clean it, first remove the stem, again using two crescent wrenches, one to hold the nut underneath the sink and one to turn the top. Once removed, disconnect the part of the stem for thorough cleaning.

remove the stem to clean it

Step 5: Clean the Stem and Reattach

Scrub the stem clean with a brush, removing any caked-on debris before soaking in white vinegar. After soaking, lubricate the working parts of the stem assembly with faucet grease and reattach.

clean the stem and reattach