I have a 1/2 inch copper pipe that is a 90 degree to the ground coming out of my slab on the outside of the home. It has never had water come from it before that I know. The water is not "running" out at a high speed, but is more than a drip for sure. It is cold water. It is not near any hot water heater or bathrooms. When I turn off the water main to the home, it stops running out of the pipe as well. I don't see any water on the floors, ceiling (two story) or walls. Running a sink or toilet does not change the flow. The hot water heater is on the other side of the home. I have No idea what this pipe is for, but it appears to be for draining of something. Any ideas what it is? Thanks

What you have coming out of your slab is a drain line for the temperature and pressure relief valve on your water heater. Sound like you have a faulty T&Ptha must be replaced. Good luck, Tom

Thank you Tom very much. I will look into this and appreciate your input.

Tom, would the water be cold and stop running when I shut off water main? Just seemed odd since hot water heater. I'm a novice home owner. Thanks

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Originally Posted by speedball1

What you have coming out of your slab is a drain line for the temperature and pressure relief valve on your water heater. Sound like you have a faulty T&Ptha must be replaced. Good luck, Tom

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Tom, would the water be cold and stop running when I shut off water main? Just seemed odd since hot water heater. I'm a novice home owner. Thank you for your help as I will check for it somehow, though not sure how to verify.

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Originally Posted by speedball1

What you have coming out of your slab is a drain line for the temperature and pressure relief valve on your water heater. Sound like you have a faulty T&Ptha must be replaced. Good luck, Tom

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Picture attached if I did correctly. PVC pipe connected to Pressure Relief Valve and goes directly outside of house opposite side of home from Copper Pipe with water coming out. Shut off Water heater Water line and Water Softener and it is still coming out the pipe. Any other clues or am I just an idiot?

Hello ABunker,

Suggest to lift the Lever that I have shown in the pictuer if the water flow increase then the copper pipe is the drain from the T&P valve as Tom says, once you confirm that then we tell you what to be done, Thanks.

John

Thank you for your help. I did pulled the pressure valve and it went out the drain it was connected to, but not the one on side of house that is the 3/4 inch copper that is running. I shut off everything in the house and it kept running and the meter was still running. There is No sign of water damage in the home. Nothing is wet. The only way to get the copper pipe from dripping is to shut off the water main. It is not the Air Cond drain. That one is working. I am perplexed as can be. Any other thoughts?

Is it possible that this is a pipe from the water softener and that the system is regenerating? Check out the pipes at the water softener system... see if you can link the pipe and softener together... ;)

Mark

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Originally Posted by massplumber2008

Is it possible that this is a pipe from the water softener and that the system is regenerating? Check out the pipes at the water softener system...see if you can link the pipe and softener together...;)

Mark

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I pulled the drain hose for the softener out and nothing is come out of it, but water is still coming out of Copper Pipe on side of the house. This is unbelievable.

Show us a picture of this pipe.

From what I see your house has CPVC. However, in lieu of an expansion tank you may have a thermal expansion relief valve on the hot water heater in addition to the TPV. Turn the water off to the HW heater. Water stop? I can't imagine anything else it could be.

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Originally Posted by ma0641

From what I see your house has CPVC. However, in lieu of an expansion tank you may have a thermal expansion relief valve on the hot water heater in addition to the TPV. Turn the water off to the HW heater. Water stop? I can't imagine anything else it could be.

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Attached Picture of Pipe that is coming out of slab and clear cold water coming out. The house is 25 years old. The plumbing I believe is copper, but when they put a new hot water heater in 4 years ago, they attached with CPVC.

I turned the water off/shut off valve at Cold line on the hot water heater and it continued to run at the pipe. I appreciate very much the advice. My brother and I are perplexed to say the least.

Is the boiler drain to the hot-water heater connected to a copper pipe? There is no doubt in my mind that this is some sort of the drain. Start shutting off the supplies to various fixtures and seeing if the water doesn't stop. Let me know, Tom

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Originally Posted by speedball1

Is the boiler drain to the hot-water heater connected to a copper pipe? There is no doubt in my mind that this is some sort of the drain. Start shutting off the supplies to various fixtures and seeing if the water doesn't stop. Let me know, Tom

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Have had a plumber there. Says he thinks the drain pipe has rubbed under the slab with the cold copper pipe in the slab and the water from the cold pipe may have a pin hole leak and rubbed up against the drain pipe. Sounds out there, but now have a Leak detector coming in to find it. They can hear it but not pin point it. I'm starting to see $$ signs in my head.

Let us know what they find. Good luck, Tom