Re: Pipes, Hammering, VERY LOUD, 10 seconds or more
Posted by Steve on September 02, 2001 at 19:19:38:
In response to Re: Pipes, Hammering, VERY LOUD, 10 seconds or more
: This is for my parents. They built their retirement house in about '84 and it's on a septic tank with well water and in the last 8 months or so there is this horrific, I mean HORRIFIC, sound of vibrating, HAMMERING pipes unrelated to anything anyone is doing with water. In other words, no one is even using water when it happens. In fact, it mostly happens in the middle of the night and wakes everybody up. It sounds like a locomotive coming through--the sound builds fast and stays there for up to 10 seconds or more. Dad has to flush a toilet which basically stops the sound dead in its tracks. It's in the wall of the laundry room at the back of the house, but on an inside wall, but if we are in the front of the house--20-30 feet away--the sound is so loud you cannot hear yourself talk. Yes, the water heater, the heat-pump, both bathrooms (2-story house) and most everything else is right there but the well head is far away. It may happen 10 times a day in clusters or not for weeks. Very strange. Before they tear the wall out I told them I'd search the internet. (

I'm not saying this is the cause 'cause you probably have to be there to know for sure, but it sounds like because it happens mostly at night when everyone's in bed and no one is using any water the well pressure builds up enough to force water into the holding tank and what you hear is the pressure change in the pipes water trying to be forced into them and the tank pressure building especially if when you flush the toilet it stops because then the pressure is reduced you might try installing a diaphram controlled expansion tank that would take the pressure off the pipes and maybe fix it

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