My plumber has told me that I need a "vacuum break" on the cold water supply to my electric water heater ( Massachusetts plumbing code? )
I DO understand why this is appropriate for a house connected to a municipal water system. I am NOT connected to a municipal water system however. There is NO town/municipal water system in the town of Eastham!
Everyone in the town of Eastham has a PRIVATE WELL !!!
Why do I need a "vacuum break" in my cold water supply to the water heater?