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I installed a new heating system with an inderct tank about 8 months ago. The existing WM cast iron boiler was beyond repair to many leaks. I installed a Baxi 1.33 GA with a Steanless Steel tank Modulo 2. Back just before Thanksgiving I was called out because the hot water was getting rust color. The rod was gone so I drained down the tank and vec. it out and instaaled new one. I just went out again this weekend and the same thing. Had to install new rod. I am not using dielectric unions I am using the piping kit that goes with Baxi boiler and tanks.
I know some brand names in the past didn't want them at all it voided warranty. I told the home oner to get ahold of power complany to check things out als try to get election. I did check the ground at water meter it looked good but I am plumber not elections. Any other thought Thak for your time.