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Old 09-10-2015, 09:42 PM   #1
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Main Valve


A friend of mine is having a plumbing problem and he's asked for my help. This is his main shut-off valve for his building which turns off the water to his home and his two tenants (one is basement and another on the third floor).

Main Valve-imageuploadedbydiy-chat1441939240.942814.jpg

He reports that he hears a vibrating at the main valve which only stops when he turns off the water to the entire building. The ball-valve is fairly new. Where should I have him start troubleshooting?

He reports that even when there are no faucets on and there is no demand for water in the building (after confirming with his tenants) that the vibrating at the main valve is relentless. He says that it feels like there is water continuously passing through the valve at all hours of the day, even though he has checked that there are no leaks in his building (tenants included).

What can this be?

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Old 09-10-2015, 10:20 PM   #2
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Start by checking water pressure at an outside hose bib or washing machine bib with a water pressure gauge available at any big box store. Around 50-60 psi is normal, anything higher than 80 psi should be addressed with a water pressure reducing valve.

Next, if installed, check pressure reducing valve.

Finally, check water heaters expansion tank. Pressure at the tank should be close to your incoming water pressure. If water comes out, it needs replacing.

These are just a few quick checks that can be done in a few minutes. Please post results. Thanks.

Others will be along with more suggestions.

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Old 09-10-2015, 10:24 PM   #3
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I recently had a customer with high water usage. Turns out the water heater temp/pressure relief valve at his heater had failed and was discharging outside the house.
Has your friend checked the water meter dial? Does it move while "no" water is being used?
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Old 09-11-2015, 07:43 AM   #4
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Quote:
Originally Posted by jmon View Post
Start by checking water pressure at an outside hose bib or washing machine bib with a water pressure gauge available at any big box store. Around 50-60 psi is normal, anything higher than 80 psi should be addressed with a water pressure reducing valve.

Next, if installed, check pressure reducing valve.

Finally, check water heaters expansion tank. Pressure at the tank should be close to your incoming water pressure. If water comes out, it needs replacing.

These are just a few quick checks that can be done in a few minutes. Please post results. Thanks.

Others will be along with more suggestions.

He says he's already addressed the water pressure and it's normal. He does not have a pressure reducing valve. His electric water heaters (tenants' as well) do not have expansion tanks.
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Old 09-11-2015, 07:44 AM   #5
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Quote:
Originally Posted by TheEplumber View Post
I recently had a customer with high water usage. Turns out the water heater temp/pressure relief valve at his heater had failed and was discharging outside the house.
Has your friend checked the water meter dial? Does it move while "no" water is being used?

We do not have water meters in this area.
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Old 10-22-2015, 08:13 AM   #6
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It ended up being a burst pipe on the city's side so they had to excavate to correct it:

Main Valve-imageuploadedbydiy-chat1445519489.378963.jpg
Main Valve-imageuploadedbydiy-chat1445519506.082162.jpg
Main Valve-imageuploadedbydiy-chat1445519520.265091.jpg
Main Valve-imageuploadedbydiy-chat1445519534.099719.jpg
Main Valve-imageuploadedbydiy-chat1445519547.235295.jpg
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Old 10-22-2015, 12:26 PM   #7
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Wow! quite an extensive repair. Good thing it was on their dime. Glad you got everything working right now. Thanks for the update.

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