2007-01-13 06:43:41 · 7 answers · asked by carey p 1 in Home & Garden ➔ Decorating & Remodeling
If it is only when you turn off a tap then it is because the change in water pressure causes a pipe to flex and it hits against a stud or building support of some kind. There is couple of ways to stop it most times. If the pipe is accessible then put more clamps on it. If you can only see some of the pipe and you are handy with plumbing then here's what you do. Buy a 'T' fitting, a piece of copper pipe (usually 1/2") about 6" is all you need so beg one from your neighbourhood buddy! and also a 1/2" pipe cap. You figure out which pipe (hot or cold) by turning it on full then off quickly. Cut into the appropriate annoying pipe anywhere in the circuit (basement good place) put in the 'T' facing directly up, attach 6" piece, then cap it. You end up with a vertical 6" piece of copper capped off. What this does is it provides an air reservoir so when you turn off the tap quick it compresses the air instead of flexing the pipe and like magic your knocking pipes are quiet!
2007-01-13 06:56:31 · answer #1 · answered by Spike 1 · 0⤊ 0⤋
Before spending a lot of time or money, shut off the water to the house and drain the house piping. Open all the faucets.
Then close the faucets and see if the knocking goes away. Air in the pipes does not cause knocking, it helps diminish it.
2007-01-13 15:27:23 · answer #2 · answered by Ed 6 · 0⤊ 0⤋
Get a guitar to go along with it and you can have your own band.
If the knocking sound is when you turn off the flow at a faucet, it is "water hammer" otherwise it is the vibration caused by change of temp caused by water passing through cold pipes. If you have access to the pipes, make sure they are tightly secure to the beams. Water Hammer is more complicated and would need to be addressed by adding extra pipe at the source of site of use. Look up water hammer on your browser and you will find a diagram of how to solve it.
2007-01-13 14:52:05 · answer #3 · answered by funblock 1 · 0⤊ 0⤋
a licensed plumber will be needed to rid the knocking. i grew up in a house with a bunch of brothers and sisters where the knocking was never fixed. couldn't afford a plumber and the man of the house was bone-idle and could only go to work and come home for his beer. it was all okay. it doesn't hurt anything. depends on how your house is built and how the pipes are installed just how much it will cost. typically would require tearing out some wall to access the offending pipes. no room to explain further. just consider $1000 would be my ballpark guestimate.
2007-01-13 14:51:54 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Be sure your pipes a mounted to you beam firmly. The easiest way to stop the hammering is to add a short 6 inch or so piece of pipe with a cap on it in a vertical postion pointing up. The air in that piece of pipe will absorb the hammer.
2007-01-13 14:56:50 · answer #5 · answered by Get Real 4 · 0⤊ 0⤋
Air in your pipes ,they need to be bleed.Turn the water off then turn back on then let all taps run for a bit.Or 2 pipes are hitting one another when the water rushes through them causeing them to rattle.That plastic black foam stuff should work ,just wrap it around the pipe.
2007-01-13 14:54:55 · answer #6 · answered by fossilrocker1961 2 · 0⤊ 0⤋
You've got air in the lines...
Time to call a plummer
2007-01-13 14:52:57 · answer #7 · answered by In my humble opinion... 2 · 0⤊ 0⤋