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Thread: Kitchen Sink Shutoff Valves

  1. #1
    DIY Member psjr56's Avatar
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    Default Kitchen Sink Shutoff Valves

    What is your preferred type of shut off valve for under a kitchen sink. Have to help my future son-in-law put in a new faucet and the cold shut off is seized. I usually go to the local Plumbing supply, stuff at the big box stores looks cheap. Doesn't have to be pretty. We'll also probably use SS braided hoses, cabinet has a center stile so getting in there is a pain. Thought about compression fittings, copper pipe is 1/2". Any suggestion or comments good or bad are welcomed, I have thick skin, lol.

    thanks, Pete

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    I don't know if it's a code thing in Jersey, but on the West Coast, we use compression stops.

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    DIY Member psjr56's Avatar
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    Terry, What are compression stops? Is this the type of valve (e.g. ball valve) or the fittings to connect with. Never heard the term compression stop.
    Last edited by psjr56; 01-17-2012 at 05:37 PM.

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    It's the manner in which the fitting attaches to the pipe. There are many, but some only work with certain pipes. On copper, your common choices in probable order of common usage are compression, soldered, or threaded. There are some companies that also make 'push-on' fittings that use gripper teeth and an o-ring(s) to make the seal, but the other three have stood the test of time.

    A compression fitting uses a compression washer over the pipe that gets sandwiched into the valve by a nut to make the seal. the soldered is probably obvious, as is the threaded one (where the pipe dope and/or thread sealant fills the gaps in the threads to seal). My preference is a 1/4-turn valve which doesn't have a washer to get old and stiff.
    Jim DeBruycker
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    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Flare is not very popular in New England? Very common here in Florida.

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    DIY Member psjr56's Avatar
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    thanks for the replies so far. I was thinking 1/4 turn with compression fittings. Only place I've seen flare fittings used was either oil heater fuel line or on car fuel & brake lines.

  7. #7
    Retired Defense Industry Engineer jadnashua's Avatar
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    As I understand it, flare requires soft copper...the more prevelant piping here is rigid copper.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  8. #8
    Moderator & Master Plumber hj's Avatar
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    You would be most likely to find flare valves in mobile homes. Some new faucets, but maybe not Moen, come with integral supply lines these days, so you cannot use the stainless steel ones.
    Licensed residential and commercial plumber

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