Relief Valve Keeps Opening? Thermal Expansion Explained | Repair and Replace

What causes the pressure relief valve to keep opening? What causes a water heater to leak or drain water every day? In this quick episode of Repair and Replace, Vance explains how the pressure relief valve works in a water heater and what can cause the valve to open intermittently or even daily. In some homes a pressure reducing valve or backflow preventer installed on the main water line will create a closed system. Normal water pressure expansion in a closed system will cause the pressure relief valve to discharge water occasionally. This can be solved by installing a thermal expansion tank on the cold water supply line.

Buy thermal expansion tanks online: https://www.amresupply.com/catalog/Air-Scoops-Expansion-Tanks-HH4M

How do gas water heaters work? Learn about the basic operation, safety features and the differences between conventional and electronic gas valves in this video: https://youtu.be/BHUPFLbb8NY

Water Heater Troubleshooting and Repair Guides https://www.youtube.com/playlist?list=PLCo9SMjkdWBwJ4a8MT2GKTDiSuvSHg6Xk

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Видео Relief Valve Keeps Opening? Thermal Expansion Explained | Repair and Replace канала AMRE Supply