Quote:
Originally Posted by rick-l
Are those 3/4 flare fittings on the water pipe? What happened to the old dielectric union? Is that the way they do it in California?
Is that vent galvanized steel?
You need an expansion tank if you have a regulator or back flow preventer where the water comes into the house.
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+ 1 on the dielectric unions. You need them to electrically isolate the heater. I also agree on avoiding flex pipes. I've never had a backflow valve or expansion tank at the heater, these are usually located at the point of use here (dishwasher, washing machine, etc)