I have a hot water boiler in a house that has a lot of air problems.
I have a hot water boiler in a house. The system has a lot of air problems. The circulator is on the return side of the boiler, and the compression tank is on the supply side — just like I find on most jobs. Part of the house is on a concrete slab, and there are pipes running under the floor. I’m going to shut down the automatic water feeder to see if we’re losing water. How long should I leave it off?
Dan replies: If there’s a leak under that slab you should see the pressure drop considerably within an hour. If you do have a leak, that would certainly explain the air problems. Cold water contains air. Heat the cold water and the air comes out of solution. The more leaks you have, the more air you have.