Incessant radiator banging
This is my first winter owning a boiler and I was fearing that I would have to learn a lot. One of my pipes is banging incessantly, literally 50 minutes out of every hour. I have changed the water in my boiler. Any advice on dealing with this? I have three main pipes running through…
This is my first winter owning a boiler and I was fearing that I would have to learn a lot. One of my pipes is banging incessantly, literally 50 minutes out of every hour. I have changed the water in my boiler. Any advice on dealing with this? I have three main pipes running through my house and only one of them is banging like this. Thanks.
Slightly elevate the sides of the radiators that are away from the pipe so the water drains back down the pipe. Should help somewhat.
sometimes you can get rid of banging by insulating certain pipes. and as mentioned before pitch is also a big factor.
also, Your water level could be too high in your boiler. i.e. there’s water in your pipes.
check the glass valve and make sure your boiler is at a decent water level.
11:22 is correct. steam rads need to be pitched to let the water out. That said, OP mentions that it’s a pipe banging and not a rad. Luckiily, the same principal applies to the piping, it needs to pitch back towards the boiler over its entire length. Given that the usual (but not always) method of installation is to distibute horizontally low and pipe up near outside walls, have a look at the pipe hangers in the basement to see if any of them have failed causing the horizontal pipes to dip. If they are okay, then the problem could be on the short leaders between the vertical risers and the rads. To solve this, raise your rads on the knocking line by placing a 1/2″ shim under all the legs on each rad. This will cause the pipe to pitch slightly, enough to stop the short leader pipes from banging.
i’m not 100% sure, but if your radiators are steam radiators, then you should check if the radiators are angled properly to let them drain. i believe the banging can be caused by hot steam hitting cold condensation that hasn’t drained properly.