![]() ![]() You will have to disconnect the overflow line leading away from the TPR valve. Models with a TPR located on the side need to be drained until the water level in the tank is below the valve.Ī good rule of thumb is to connect a garden hose to the drain outlet and fully drain and clean your water heater while you have it shut down. Turn on the hot water faucet closest to the tank and allow the pressure in the tank to drain. Leaving the power or gas on when the tank has been partially drained can cause serious damages or injuries. Prepare the Water Heater for Repairsīefore doing any work on a water heater, you should always turn off the circuit breaker or set the gas control valve to the PILOT setting. This test should be performed before regular maintenance, or at least once a year. If the valve does not lift upwards with slight pressure, or it lifts but there is no corresponding heat or running water, then the TPR is faulty. The overflow line should begin to heat up immediately, and you will hear the sound of water passing through it. ![]() This opens the TPR and should allow water to flow. If the valve passes this initial test, lift the test lever on top of it. There should be some warmth next to the valve, but the line should only be hot if the valve is faulty. First, place your hand on the overflow pipe leading away from the valve to determine whether the line is hot. There is a simple test to determine whether the TPR valve is operating correctly. Here’s how to test and replace a pressure relief valve. If the pressure relief valve is leaking for no reason, it can prevent the water from heating sufficiently. It acts as an overflow for the tank, and serves a very important purpose if the thermostat malfunctions. This means that at no cost to you, we may receive a small commission for made purchases. Note: This post may contain affiliate links. ![]()
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