I have a strange sound that only happens when the hot water is turned on. It started happening after I remodeled my upstairs bathroom with new faucets (new tub/shower diverter/fixtures and sink faucet). (I had previously done new copper piping to this bathrm about 3 years prior, but the sound didn't start until after the new fixtures were installed 6 months ago). I have done all the plumbing in the house, so it is all now 100% copper. This is the first time I've heard this type of noise in a plumbing situation. It's not the sound of copper pipes contracting. It sounds more like a hammering sound. (sounds more like an air chisel).
I've been trying to troubleshoot this for about 6 months now, as it is intermittent. However, today I found a way to duplicate it consistently. If I turn the Hot water from a faucet 1/4 turn, so it's part way on, I hear the sound. While this is happening, if I open any of the hot water faucets in the house just a little bit, the sound stops; if I turn them back off, the sound resumes.
I've traced the hot water lines to see if I can see anything and have even tried completely loosening all the straps that hold them to the ceiling. I've also tried tightening them back down and putting in more straps. It does not appear like the pipes are rattling against anything. I've even wiggled all the pipes when the sound was on but the sound continues.
It's important to note that this sound ONLY occurs with the Hot water on. It never happens with just the cold. It's not the hot water tank either (I have tankless), but I can tell the sound is not coming from it.
It almost sounds like there's air or something in the lines that makes this hammering sound. Any ideas???
I've been trying to troubleshoot this for about 6 months now, as it is intermittent. However, today I found a way to duplicate it consistently. If I turn the Hot water from a faucet 1/4 turn, so it's part way on, I hear the sound. While this is happening, if I open any of the hot water faucets in the house just a little bit, the sound stops; if I turn them back off, the sound resumes.
I've traced the hot water lines to see if I can see anything and have even tried completely loosening all the straps that hold them to the ceiling. I've also tried tightening them back down and putting in more straps. It does not appear like the pipes are rattling against anything. I've even wiggled all the pipes when the sound was on but the sound continues.
It's important to note that this sound ONLY occurs with the Hot water on. It never happens with just the cold. It's not the hot water tank either (I have tankless), but I can tell the sound is not coming from it.
It almost sounds like there's air or something in the lines that makes this hammering sound. Any ideas???