How to shut off water with a dahl partition stop valve?

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Posted by: from Milton
4/17/2015 at 7:30:07 PM

I have what is called a dahl partition stop valve - see picture. I would like to change the faucet in my washroom but I can not figure out what tool do use to shut off the water.

Does anyone know what tool do you use? What is it called and where to get it?

Thanks for any info.

How to shut off water with a dahl partition stop valve?
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Date/Time4/17/2015 at 9:07:39 PM

Hello this is a cover for the valve which should just pop off then you need a valve key to shut the water off. The image below is the key you need. Turn clockwise to shut off water and ps sometimes these can be stiff so it may take some force.

Good luck.

How to shut off water with a dahl partition stop valve?
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Leo in Milton
Date/Time4/17/2015 at 9:12:28 PM

Thanks Alan for the response.


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Date/Time4/17/2015 at 9:21:55 PM

The picture you provided is just a cover. It pulls straight out, to pop off. Then you will find what appears to be a copper pipe, but is just a sleeve, that leads to where the valve actually is.

What you need is a Partition Stop Key. I have added the picture below. It is usually brass, with a tee handle, approx. 6"-8" long. You insert it into the copper pipe, and turn it, while lightly pushing on it. You should feel it 'push' on to the valve, and then you turn it clockwise, until you feel the resistance of the valve closing. Test to see water is off, and continue on, changing your faucet.

The key is available at your local plumbing supplier, and some hardware stores may have it. Your best bet, however, will be the plumbing supplier.

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