SAS
Member
I have a hot water recirculation system with a return line that connects to the cold water feed of my water heater. There is a check valve on the cold water feed that is leaking. There is also an expansion tank connected to the water heater feed. When I go to change out the check valve, what (if anything) do I have to do to relieve the pressure from the expansion tank? I don't want to cut the pipe and suddenly be drenched by water from that tank. (Or am I misunderstanding how that works?) Can I just open any hot water tap? Open the drain valve on the hot water heater?
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