The purpose is that each heater in a true parallel piping arrangement will out perform a series piping configuration in hot water delivery.
A parallel install also works both heaters equally.
OK I'll bite, what is the correct configuration if piped in parallel (correctly)?
Glad you were able to fix it. That would have really annoyed me. I get annoyed when professionals don't do things right.
I think handymen built & renovated my house. LOL. I know a lot of the plumbing and wiring was done by people who were not pros.
Ooh, new circulating water pump! Is that for recirculating hot water?
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