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Hot Water Heater Install Details?
I'm looking for some help on the finer details of the hot water heater installation.
Background: Existing steam boiler with coil for hot water. Adding a hybrid hot water heater which will be located on the other side of the house closer to the kit/baths. We are going to use the steam boiler as a preheat in the winter.
Do I need a thermal expansion tank in this install? Recommendations on brand/size etc.
In the plumbers email to me, he mentioned having to install a mixing valve. I don't know where or why. Reading the water heater instructions it doesn't mention this other then to say that there should be a mixing valve at each fixture. He didn't mention multiple, so I'm assuming he is suggesting 1 right after the water heater. Would you do this?? Brand recommendations?
The water heater has a relief valve and two condensate drains, can they all be plumbed into the sewer pipe, similar to the washing machine.