Sound of running water but nothing is turned on?

[Leaky 62]

Water is constantly running through the cold pipe that leads directly from my stop tap through a few meters of pipe along and then upstairs. I can clearly hear it (and so can the rest of the family)and feel the vibration caused by the flow of water through the pipe. When I turn the stop-cock off it stops. Nothing is turned on. Toilets are full and not leaking. No problems with anything water-using fixture save a slight drop in pressure you'd expect when more than one appliance is being used at the same time. After hours of searching no signs of a leak anywhere. And this has been going on all weekend so if there was a leak I'd presume water'd be everywhere given the sound is noticeable. No wet ceilings, no sound of spraying water under floorboards etc. Very confused as I think I've eliminated everything. Can anyone help please?

 

[rpm]

How old is the property, could easily be a leak under the floor, any signs of damp around the outside of the property.

 

[Leaky 62]

It's a mid 50's council property. Concrete floors. No signs of a leak from upstairs. The bathroom is directly above a part of the kitchen where I know water would come through (previous with son!). Celing plasterboard is dry and solid - sounds hollow when I tap it. Pressure in shower is lower than normal but still working fine. No sound of a leak from bathroom but it's the only water up there (upside down glass on shower tray etc). Could it be an external leak simply transmitting sound along the pipe? Thanks

 

[Leaky 62]

Sorry, should have said no signs of a leak external to the property either.

 

[Leaky 62]

50s council house. No signs of an internal leak and the sound has been there all weekend. Bathroom is directly above kitchen and from previous with son (!) I know where water would leak through. Ceilings are solid and hollow sounding when I tap them. No signs of an external leak, but could the sound from an external leak transmit along the pipe? (when I turn the stop tap off the same vibration is still on the external side). Thanks

 

[Burger]

Yes it could be an underground burst, but I remember correctly it usually goes louder if you turn it off at your internal stopcock.

 

[Brambles]

Turn off all your taps / outlets and check your water meter to see if there is flow into the property

 

[Leaky 62]

Thought of that one but I don't have a meter so snookered

 

[PETE 123]

Overflow from tanks in loft water running into gutter?if you have tanks.

 

[Leaky 62]

Thanks Pete - but nothing in the loft. No overflows, no water running away externally, just the sound and vibration of water going through the internal pipe when nothing water-related is being used. I can't fathom it....

 

[bacon_sandwich]

check toilets, some overflow into bowl, can be the smallest trickle

 

[rpm]

check toilets, some overflow into bowl, can be the smallest trickle

Easy check

 

[Millsy 82]

Dry the back of the toilet pan then stick a bit of tissue there if they start getting wet you toilet needs looking at.