DescriptionThis video provides step-by-step instructions for replacing the temperature & pressure relief valve on AO Smith gas water heaters. The most common reasons for replacing this part is if it is damaged or leaking.
All of the information in this thermostat replacement video is applicable to the following brands: AO Smith
Step-By-Step Instructions1
To replace the temperature and pressure relief valve on this a.o. smith gas water heater…
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… you will need a pipe wrench and thread sealant.
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Before you begin the procedure, shut off the gas supply to the unit.
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Close the water intake valve as well.
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Now open the drain valve to drain enough water from the tank so the water level is below the temperature and pressure relief valve.
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You can open a hot water faucet in the home to assist in discharging the water.
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After draining the water, close the drain valve.
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Use the pipe wrench to help unthread the discharge tube.
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Now use the pipe wrench to help unthread the old valve by rotating it counter-clockwise – this may require some effort.
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To install the new temperature and pressure relief valve…
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… thread the valve into the tank clockwise, using the pipe wrench to tighten.
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Apply some thread sealant to the threads of the discharge tube…
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…then thread the tube into the new valve.
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Now open the water intake valve and allow the tank to refill.
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Turn the gas supply back on…
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… and the water heater should be ready for use.