Sound of water lapping at a radiator

James Smith

I have a 1 pipe steam heating system in my home. When heating up one of the radiators has the sounds of water lapping. It doesn't seem to be coming from the radiator itself but from the piping leading up to the radiator. My guess is that this has to do with the pitch of the pipe coming to the radiator (it has different angles then all of the other radiator piping), there must be some section where water is pooling. Does this sound reasonable?

Big Ed

Yes.....

....it does. Raising the radiator off the floor a little might help.