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karter56

Water heater piping

karter56
11 years ago

I am replacing my water heater hooked to my hydronic forced air system. The old system had 2 heaters hooked in parallel. Supply went in first heater then over to second and hot water out to house. Off of that line was a circulating pump then check valve and over to the air coil. It then went back to the drain of the first water heater. I am separating the systems to avoid legionaire's disease. The supply goes in and out to the pump and check valve, over to the air coil and back to the drain as the last system did. Do I need any additional check valves or an expansion tank?

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