Need help with supply lines to bathroom

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by redgreen, May 24, 2008.

  1. redgreen

    redgreen New Member

    Joined:
    May 24, 2008
    Location:
    Canada
    First, thanks for a great site. I have been doing lots of reading these past few months and decided to tackle adding a main floor bathroom (sink, toilet and shower). I have almost completed all the D/W/V portion and will be starting the supply lines but I am a bit confused regarding sizing.

    This bathroom is directly below an existing upstairs bath and was wondering if I could tee off the 1/2" lines that supply the upstairs bath or do I need to run separate lines? The existing cold line tees off a 3/4" supply and the hot tees off a 1/2" line that is 6 feet from the water heater. Let me know if there is any other information that I need to provide.

    Thanks.
     
  2. Terry

    Terry Administrator Staff Member

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    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
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  4. redgreen

    redgreen New Member

    Joined:
    May 24, 2008
    Location:
    Canada
    Thanks Terry. I could tee off of the 3/4 " cold pipe in the basement but I only have 1/2" coming off my water heater supplying the whole house. Is there any difference in pressure if I take the hot from the pipe going to the upstairs bath or at the supply from the water heater? I wouldn't think so.
    :confused:
     
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