DIY Network

How to Install a Stop and Waste Valve

Use these step-by-step instructions and easily install a stop and waste valve in no time.

More in Plumbing

  • Time

    Under Half Day

  • Price Range

    $100 - $250

  • Difficulty



Step 1: Cut the Pipe

The first step is to cut out a section of the cold water line to insert the mixing valve. Cut out a small section of both the cold and the hot water lines using a pipe cutter (Image 1).

Note: have a bucket ready to collect any water that is left in the pipes (Image 2).

Step 2: Install the T Fitting

Install the T fitting on the hot water pipe.

Use the torch and flux to solder it onto the existing hot water line.

Note: Take off the drain before soldering so the heat doesn't melt the rubber gasket. After soldering, replace the drain.

install the T fitting

Step 3: Attach the Stop and Waste Valves

Use the same soldering technique to attach the stop and waste valves onto the hot and cold supply lines.

Note: Make sure the arrow on the valve points in the direction the water flows.

Now you can turn on the main water supply again.

attach the stop and waste valves