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Thread: 1/2" vs. 3/8" water supply question.

  1. #1

    Default 1/2" vs. 3/8" water supply question.

    Hi,
    Ripped out all the old rusty galvanized pipes and replaced them with a Pex manifold and 1/2 " tubing. The question is can I run the 1/2 right to each of my sinks, showers and toilets or do I need to reduce the flow to 3/8" Can I reduce it right at the appliance with a 1/2 to 3/8 connection?
    Thanks
    sw

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Default

    You can run 1/2" to them.
    They make fittings for that.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    You can put a compression stop valve on the pex - the OD is the same as copper pipe. You need a reinforcement ferrule, which is packaged with a valve, or available in bulk if you get one packaged for copper. To make things more 'robust', it's nice to use a copper stubout for the valve. These can be anchored in the wall and provide good support for the shutoffs.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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