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 Split zone heating system with other zones
Author: Plumber07 (MA)

I have a heating system that has 3 zones and one of the zones is a split zone. I'm still getting heat out of the split zone even when the thermostat and pump are off. There is a sweat check valve on on the supply side. Because it's a split zone should I put a sweat check on the return to stop the migration of water when the zone is off?

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 Re: Split zone heating system with other zones
Author: packy (MA)

repair or replace the one that is there.

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