Help with a curb stop

Discussion in 'Plumbing and Drains' started by rjh, Jan 10, 2019.

  1. rjh

    rjh

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    I have a steel building with water lines underground to it. Inside the building copper supply lines come through the concrete (both cold water) to a sink. Outside on the sidewalk is an old fashioned farm pump looking valve that sticks up about 3 feet from the ground; you lift the huge handle and water comes out year round (I guess it's driving a valve deep under ground). Next to that is a 3" PVC cap that when removed, reveals a 3-4 foot pipe with a simple valve in the bottom. I use a curb stop tool to open that valve to turn the water on to the sink inside the shop.

    My problem is now that when I try and close the curb stop so I can shut off the heat in the shop for the winter and prevent those pipes from freezing, the valve leaks - you can hear water hissing out and see it in the bottom of the access pipe. If I open the valve and let the sink faucet stop the water flow everything is fine - the curb stop doesn't leak. It was closed for ~2 years, then left open continuously for ~5 year, then we opened and closed it a few times this fall. I just went out to winterize and found it leaking when closed.... so now I've got an electric heater running to keep the pipes from freezing, but it will occasionally trip the breaker and I don't want to have to go check on it every morning.

    Does anyone know of a way to stop that curb stop from leaking when closed? The only access I have too it is down a 3-4 foot length of pipe. I'm really hoping I don't have too jackhammer out the sidewalk and excavate all the way down there to the valve to turn it off!

    Thanks!
    Rich
     
    rjh, Jan 10, 2019
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  2. rjh

    rjh

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    Could I run some kind of expansion tank on the stubbed in pipes to allow them to freeze and not split the copper that's run up through the unheated cement slab?
     
    rjh, Jan 10, 2019
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