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gero 08-14-2008 06:22 PM

plumbing
 
im looking for info re a loud whistling noise on my domestic incoming water supply,there is no prv or water meter,even when the stop cock in the house is closed the whistle is very loud or when there is no flow the whistle is very loud but more so at night time,the onlyway to silence this whistle is to turn off the stop cock out on the footpath.

Nestor_Kelebay 08-15-2008 02:45 AM

"even when the stop cock in the house is closed the whistle is very loud or when there is no flow the whistle is very loud but more so at night time,the onlyway to silence this whistle is to turn off the stop cock out on the footpath."

Is there a way to check for flow through your plumbing when the "stock cock in the house" is closed? Can you mark your water meter needle position with a felt pen, then let your plumbing whistle for a while (without using any water) and check the needle position later to see if the needle has moved relative to the mark.

I think what might be happening is that the stop cock in your house is leaking, so closing it doesn't make much of a difference if the flow rate is small and the leakage is going into the toilet in your house (or one of the toilets if you have more than one). Because of the way toilet fill valves work, they can open and close VERY rapidly, causing a noise that sounds like anything from a whistle to a fog horn. Take the tank lid off your toilet tank(s) and see if the water level in the tank is at the top of the overflow spout. If so, you need to replace the rubber diaphragm in that toilet tank's fill valve.

gero 08-17-2008 06:27 PM

whistle in domestic water main
 
thk's for your reply and idea's
we dont have water meter's on our domestic water in ireland,both toilets are working fine re overflow.
the supply company have a stopcock out on the footpath and we have a stopcock in the house,this loud whistling/whining noise starts late at night and continues non stop untill 6/7am! when the stopcock in the house is turned off this noise is still present,only when you shut off the water company stopcock out on the footpath does this noise stop,any other idea's?

wire_twister 08-17-2008 06:41 PM

Maybe a leak in the pipe between outside stopcock and house. You might need to install a PRV, the water pressure in the supply line will go up at night (no one is using water) and may be over pressureing a camode fill valve. Also on a community water system sound can travel through pipes, the noise may be originating at your neighbors house and traveling to yours, of course I am an electrician and everybody knows we just stop up all our pipes with wires.

Mike Swearingen 08-18-2008 08:04 AM

My first guess is that it's a faulty toilet tank fill valve. If you have a stop valve for the toilet, turn it off to try to stop the whistling. If it does, replace the fill valve. They're inexpensive and easy to change.
Good Luck!
Mike

Termite 08-18-2008 09:15 AM

Any water getting by the stopcock is being consumed somewhere in the home. I think that the idea that it is a faulty water closet fill valve has a lot of validity. Let us know if that works!


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