The Problem: Adding a a backflow preventer, check valve or water meter with a check valve creates a
closed loop system. When water heats up, it expands with no place to go but through the relief valve.
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The PH Solution: A PH Series thermal expansion tank installed on the cold water inlet provides a reservoir
for the expanded water. Water safely enters the tank and is released back into the system on demand. No more
dripping relief valves, and more importantly, a safer system!
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