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 Hear water running in pipes wall, but no faucets on
Author: Florida Bob (FL)

Could hear water running in pipes in wall in master bath (one wall on backside of shower and the other just adjacent to that), but no faucets or shower on, no leaky toilets eithe, no outside spigots on either. Even closed lines to toilets just to make sure, but still could hear sound of water running. Turned water to house off just make sure I wasn't crazy and hearing things, and noise stopped. Thought I must have a leak. Looked everywhere for signs of water coming out of walls inside and out, but nothing (only place I can't look is under tub--we're in slab on grade foundation in South Florida and there's a hole in slab where tub goes). Pulled cover off single valve shower faucet and thought I would hear sound of spraying leak in there but nothing, and felt no water on the piping around faucet which I could reach. Almost started cutting drywall on wall on back of shower to get better look, but right before I did that, I reassembled shower faucet. I turned shower faucet on 3 times quickly and sound of running water in walls stopped. Could a faulty single valve faucet cause the sound of running water in the pipes but no actual water leaking anywhere? The house was built in 1978 and it looks like the original cartridge. I just want to be sure I'm not leaking a ton of water internally under the house or something and the next thing I'm in a big sinkhole. Thanks for your help.

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 Re: Hear water running in pipes wall, but no faucets on
Author: LemonPlumber (FL)

The water meter is your friend if you have one.take a wet rag and clean the face of the meter off.look for a very small spiked chrome wheel or a red triangle on the face of the meter.it will be moving if you are using water.these little wheels are very sensitive.May even move backward when the city pressure drops.Next time you hear this noise check this meter movement as it is or is not using water.As far as crossing of a valve making the noise.it would be very unusual with out water being used in the system some where.You do not have any hose faucets turned on with the hoses sprayer stopping the flow do you?some times a hose vb can call your attention .Let us know how you may out.

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 Re: Hear water running in pipes wall, but no faucets on
Author: Florida Bob (FL)

I got city water a couple years ago, so I do have a meter and will check that and get back to you. Thanks Lemon!

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 Re: Hear water running in pipes wall, but no faucets on
Author: HytechPlumber (LA)

Not sure about the shower valve but make sure your pop off valve at the water heater is not discharging.

.... X. X


....................... Good Luck .........................

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 Re: Hear water running in pipes wall, but no faucets on
Author: hj

You HAVE an underslab leak. If you still have some hot water at the faucets it has not gotten to the point where it is leaking a "ton of water", yet, but it will get there eventually. When that happens your water heater will run 24 hours a day, but your water will be cold. AT that point, some plumbers, not knowing any better, will replace the water heater, but it will not cure the problem.

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 Re: Hear water running in pipes wall, but no faucets on
Author: bill plumber (FL)

Way too soon to tell him he has a slab leak Hj. Other possibilities such as leaking T&P and or relief valve piped outside, water closet flush valve etc. isolate water heater and check meter as Lemon said.



Edited 1 times.

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 Re: Hear water running in pipes wall, but no faucets on
Author: hj

True but all of them have external signs of leakage, assuming he has walked all around the house looking for a sign of water. And not all of them are "continuous" either. From here, all we have to go on is HIS evaluation, and we have no idea how complete, or superficial, it was.



Edited 1 times.

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 Re: Hear water running in pipes wall, but no faucets on
Author: Dina4 (FL)

Our hot water has not been working, its only 5 years old and in good condition. my husband replaced the elements and its still not hot. He was going to try and replace a few other things. But i keep hearing this water running sound in the walls behind shower, and no leaks. Do i have an underground leak, if so how do i proceed? How costly is this. I live in florida with slab construction.

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