How To Bleed A Hot Water Furnace With Attic Piping

The water entering the system from the boiler s water supply valve forces the air in the pipes and baseboard out of the bleeder fitting.

How to bleed a hot water furnace with attic piping. Wrap a towel around the bowl. In this video i show you how i was able to bleed my hot water heating system. Many people find that the radiant heat generated by hot water systems to be more comfortable and pleasant than the warmth provided by forced air heat. Open the auto makeup valve and the spigot to which the hose is connected at the same time.

Keep an eye on the water pressure and do not allow it to rise above 25 psi. Bleed the air from each baseboard working from the baseboard closest to the boiler toward the baseboard farthest from the boiler. You will need to solder in elbows on the baseboard heater. Place a small bowl under the pipe to catch or contain any water that spills out.

Why you may need to bleed air from a hot water heating system. Once water starts to spurt out of the bleeder fitting close the bleeder screw. If you are going to the trouble of installing bleeders i would recommend the automatic bleeder. Allow the water to drain out of the hose until no more air bubbles are seen.

Turn the nut counterclockwise about one quarter turn using a hex wrench. If a hot water heating system develops too much air in the piping you may hear bubbling or gurgling in the heating pipes when the heating system is operating or worse so much air may be in the heating piping radiators or baseboards that heat may simply not circulate at all. The manual bleed is much less complicated but requires you to go bleed off the air by turning the valve and letting the air escape until water comes out.