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I have a 7 zone radiant heating system run by 2 boilers. There is a setup for a wood boiler outside as well but not hooked up. There is a big blue hot water holding tank as well.
House seems to heat fine. (just bought the house this last winter).
If only one person is taking a shower the hot water is fine. If there is someone running hot water at the same time or 2 showers going at the same time I can only get luke warm water. This is luke warm at the sink as well. Once you turn the other shower off the water slowly warms up again. The water in the tank is staying at a constant 125ish and does not fall during this time. I don't know much about these systems. The plumber that installed the second boiler for the bank just before we bought it seems to think there is a scald protector somewhere in the system that may be bad. I don't have alot of confidence it this guy though. Anyone know what this is?
Also I said that my expansion tank had a hole in the bladder. He wanted to put a new one in for $360. I see online that these are only a $50 item and don't look all that hard to change so I figured I may tackle that myself. I expected when I got home to find that the expansion tank would be full of water like he said but it seems like it is empty. How do I check this?
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