Piping/sizing question

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Rngr275, Jul 16, 2012.

  1. Rngr275

    Rngr275 New Member

    Joined:
    Mar 26, 2012
    Location:
    Upstate NY
    Been awhile. I am finally in my Amish house and getting started in getting some services installed. Because of the location of the cistern/well the pressure tank will be on one side of the basement and the water heater and most of the requiremnts (bathroom/kitchen) will be on the other side of the basement (~20-25feet). I am planning on sending the water from the P-tank over to the other side then have a distribution point for all the feeds (PEX manifold). Here are a couple line size questions:
    1. What size line from the P-Tank to the manifold (1"?) PEX or PVC?
    2. Tankless water heater has 3/4NPT in so can I build a 3/4" manifold on the output side to feed hot water out to the shower, sink, kitchen, etc?
    3. Would I feed the shower and sinks off seperate 1/2 lines or send a 3/4 inch suppy there then tap off that with 1/2' pex.
    4 Build the same thing for the cold water piping?

    Thanks in advance.
     
  2. Tom Sawyer

    Tom Sawyer In the Trades

    Joined:
    Nov 29, 2010
    Location:
    Maine
    I would run 1" over and reduce to 3/4" for the water heater. If your 1" line goes past any fixtures (cold) you can tee off it for them rather than go backwards later.
     
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  4. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    Can't use PVC for water supply inside the house. Use 1" PEX, CPVC or 3/4" copper.
     
    Last edited by a moderator: Jul 16, 2012
  5. Tom Sawyer

    Tom Sawyer In the Trades

    Joined:
    Nov 29, 2010
    Location:
    Maine
    Gary's right about the PVC, I missed that
     
  6. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    My dad used to say, "A blind sow can find an acorn once in awhile!" I guess a dumb DIYer can find something others have missed occasionally.
     
  7. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    Sows like acorns? I thought it was a "blind squirrel".
     
  8. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    Guess it depends on what part of the country you're in.
     
  9. Rngr275

    Rngr275 New Member

    Joined:
    Mar 26, 2012
    Location:
    Upstate NY
    Thanks Gent's!
     
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