How to Install Overflows on Stock Tanks

A stock tank such as a water heater will have a pressure relief valve to vent steam and drain water when the pressure rises too high. When a water heater overheats, it is typically caused by a faulty thermostat. When the pressure relief valve on a stock tank breaks or does not work correctly, it needs to be replaced with a new valve.

Things You'll Need

• Adjustable wrench
• Teflon tape

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Instructions

1. Close the shut-off valve for the water supply to the stock tank. Locate the pressure relief valve that is at the top of the tank.

2. Remove the old pressure relief valve using the adjustable wrench. Turn the wrench counterclockwise to loosen the valve. Take the pressure relief valve off of the tank.

3. Wrap the threads of the new pressure relief valve with the Teflon tape. Insert the new valve into the top of the tank. Turn the valve clockwise by hand. Tighten the valve fully with the adjustable wrench.

4. Open the shut-off valve to allow water to flow back into the tank.

Tips & Warnings

• Refer to the documentation for your stock tank to determine the type of pressure relief valve you need.

References

• Home Depot: Installing a Pressure Relief Valve
• Water Heater Repair Guide: Water Heater Pressure Relief Valve