Hello Eveyone!
Looking for some wisdom on next steps with some really (I mean REALLY) loud heating pipes.
System is hot water, not steam. Problem did not always exist (wasn’t like this when we bought the house 11 years ago) and it is getting progressively louder, despite efforts to solve it. House is about 100 years old.
In full disclosure, we have had three companies look at this at various points in time and none have solved it.
It sounds like a hammer hitting the pipes (a loud ringing sound that can be heard everywhere in the house) . It occurs most commonly near the point at which the pipes come up from the basement through a crawl space and where they join the register. You can sometime cause it to happen when you walk into a room. There are large heat registers in the front and back rooms of our house. This is where it occurs (although I’ve heard it a few times in my daughter’s room on the second floor). It shakes the floor in the space it’s occurring. I had always thought it was the pipes hitting the floor or subfloor, but HVAC companies think not. They have wrapped pipes, anchored the pipes to the crawl space ceiling to stabilize them, mapped the water flow to see if it is causing vacuum knocking, and also reversing and rewiring a pump that was installed near our kitchen to aid in flow since that room is cold (the company thought it was creating a vacuum, as the water flow of the pump was backward and running all the time; not just when the heat kicked in). To be clear, all of this was done AFTER we had noise, so it is not the source.
I did crawl into one of the crawl spaces and noted that the pipes were touching the subfloor. I used a saw to cut it away and give the pipe expansion room, but it didn’t help...
Would love any additional thoughts on how to handle this. It frankly drives me wild and wakes us up during the night...
If you need further clarification about details, please let me know. I’m happy to provide.
Thank you in advance for any ideas!
CC
Looking for some wisdom on next steps with some really (I mean REALLY) loud heating pipes.
System is hot water, not steam. Problem did not always exist (wasn’t like this when we bought the house 11 years ago) and it is getting progressively louder, despite efforts to solve it. House is about 100 years old.
In full disclosure, we have had three companies look at this at various points in time and none have solved it.
It sounds like a hammer hitting the pipes (a loud ringing sound that can be heard everywhere in the house) . It occurs most commonly near the point at which the pipes come up from the basement through a crawl space and where they join the register. You can sometime cause it to happen when you walk into a room. There are large heat registers in the front and back rooms of our house. This is where it occurs (although I’ve heard it a few times in my daughter’s room on the second floor). It shakes the floor in the space it’s occurring. I had always thought it was the pipes hitting the floor or subfloor, but HVAC companies think not. They have wrapped pipes, anchored the pipes to the crawl space ceiling to stabilize them, mapped the water flow to see if it is causing vacuum knocking, and also reversing and rewiring a pump that was installed near our kitchen to aid in flow since that room is cold (the company thought it was creating a vacuum, as the water flow of the pump was backward and running all the time; not just when the heat kicked in). To be clear, all of this was done AFTER we had noise, so it is not the source.
I did crawl into one of the crawl spaces and noted that the pipes were touching the subfloor. I used a saw to cut it away and give the pipe expansion room, but it didn’t help...
Would love any additional thoughts on how to handle this. It frankly drives me wild and wakes us up during the night...
If you need further clarification about details, please let me know. I’m happy to provide.
Thank you in advance for any ideas!
CC
source https://hvac-talk.com/vbb/showthread.php?2222724-Knocking-Heating-Pipes&goto=newpost
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