PVC pipe labeled DWV vs Drinking

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Jake_homeowner, Feb 26, 2007.

  1. Jake_homeowner

    Jake_homeowner New Member

    Joined:
    Feb 26, 2007
    Occupation:
    Enterprise Architect
    Location:
    Virginia
    I am setting up a chlorine injection system and retention tank and the 1 1/4 inch PVC pipe I purchased at the local hardware store is labeled DWV. The 1 1/4 pipe only needs to run about 2 feet between the injection tank and the retention tank. Does it matter that its not labeled Drinking like the rest of my 1" PVC supply pipe or is just labeling. This is on a well system running between 40-60 PSI.

    Thanks,
    Jake
     
  2. leejosepho

    leejosepho DIY scratch-pad engineer

    Joined:
    Nov 23, 2006
    Occupation:
    disabled-retired industrial fabricator
    Location:
    200 miles south of Little Rock
    The pipe you have is something like "schedule 20" for "drain, waste and vent" and is not adequate for pressure service.
     
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  4. kordts

    kordts In the Trades

    Joined:
    Oct 15, 2005
    Occupation:
    industrial service plumbing foreman
    Location:
    exurban Chicago
    You need pressure pipe, they have it at most hardware stores.
     
  5. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    pipe

    It is probably not "schedule 20" especially if it fits 1 1/4" fittings, but it is schedule 40 in size, but not strength.
     
  6. markts30

    markts30 Commercial Plumber

    Joined:
    Sep 25, 2006
    Occupation:
    Commercial Plumber
    Location:
    Phoenix, AZ
    DWV pipe is not rated for pressure and will rupture if subjected to it.
    In the case of PVC, Co-Extruded DWV pipe has a foam core and only 2 thin layers of solid PVC - inner and outer...
     
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