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Water hammer noise after new gas boiler installed
Hello, I'm hoping you can help me. We have gas baseboard heat and had a new boiler installed after Hurricaine Sandy. After the install it seems we have loud water hammer noises when the zone valve(s) are either opening or closing. The plumber that installed the boiler is not the plumber working on it now. The current plumber thought is was the zone valves. He changed one: no difference. He changed the other: no difference. He thought the pressure may have been high and changed the gauge. Gauge reads the same. It turns out he read the wrong scale on the gauge at first and thought pressure was high so he also changed the feed/regulator: no difference. The only thing odd is that after he does something it seems ok for a day or so and then the noise comes back and keeps getting louder. Usually loudest on the colder days. Now that we realized he was reading the wrong scale on the gauge we know it's not the pressure. We checked out the expansion tank and all is good with that. I am thinking maybe the piping is screwed up?? Can you look at the photos and share your thoughts on this? It's driving us nuts and I'm afraid the loud noise can also cause damage to the pipes somewhere.