06:48PM | 09/29/03
Member Since: 09/28/03
2 lifetime posts

just now the pressure releif valve started blowing out hot water randomly and I dont really know what to do, I shut off the water to the furnce and it stopped. My Dad just passed away last week and he use to do all this, I remember it leaking within the last year a small amount, the bucket it leaed into never had more than a small amount of water in it. I do not remember if he had replaced it or if it just stopped on its own. Also, I do not know if it is reletated but after I turned on the main to the house, the valve that lets water into the heatings system which I was told was on its way out and is suppose to be automatic kept letting water in the system and did not stop until I shut water off to that. Any help would be greatly appreciated!!!



plumber Tom

01:24PM | 10/01/03
Member Since: 05/10/03
810 lifetime posts
David, it very well may be related. The valve you are referring to is commonly known as an automatic feed. It's building up pressure beyond the 30 psi your relief valve is rated at. These valves are notorious for clogging up as a result of sediment build up. The spring and seat mechanism on the relief valve is also prey to sediment build-up. One side of the auto-feed should have a union, and the other gets screwed into a male adapter, therefore if you don't know how to solder (sweat copper pipe) It's a feasible repair to accomplish for the DIY'r. The boiler will need to be drained down to remove and replace the relief valve, unless you do it "on the fly" I don't recommend you attempt this while the system is hot, or your not sure.


02:31PM | 10/01/03
Member Since: 09/28/03
2 lifetime posts
Thanks Tom, I replaced that valve and the leek seems to have stopped, I would never have thought that the feeder could cause the problem, from the way it look like its hooked in, it looked as if it had nothing to do with the feed to the furnace, but that was the problem. Thanks!

plumber Tom

03:02PM | 10/01/03
Member Since: 05/10/03
810 lifetime posts
Sure no problema. It seems like the inlet side of an auto-feed is reduced in inside diameter. This is where it's prone to clogging. I alway's purchase full-port ball valves for any plumbing job. You would think they would come out with a more modern, less complicated valve. On the other hand, the auto-feed comes in handy when no helper is available when filling and bleeding a system.


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