Step 1 · Shut Off Main Water Supply and Drain Lines
The first and most critical step is to prevent water from flowing to the work area. Locate your home's main water shutoff valve, which is often found in the basement, a crawl space, or on an exterior wall. Turn the valve clockwise until it is fully closed. To confirm the water is off and to relieve pressure, go to the lowest faucet in the house (like a basement sink) and the faucet you are working on, and open both the hot and cold taps. Let the water drain until it stops flowing. Place a small bucket and some rags under the angle stop you will be replacing to catch any remaining water.
Tools and Materials
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