Step 10 · Test the New Valve
As a final quality check, it's wise to test the new valve's mechanical function. Place a bucket under the end of the discharge pipe. Carefully and briefly lift the test lever on the top of the T&P valve. A burst of hot water should flow out of the pipe. Release the lever; it should snap back down into its original position, and the flow of water should stop completely. If the valve continues to drip or run after the test, it may be defective or have debris from the installation caught in the seat, which may require you to flush it again or replace it.
Tools and Materials
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