Draining 10 Gallons per minute

Discussion in 'Shower & Bathtub Forum & Blog' started by Timster, Mar 29, 2010.

  1. Timster

    Timster New Member

    Mar 29, 2010
    Los Angeles

    I'm doing a remodel which includes a new master bath. My wife picked out a spa type shower that pumps upward of 10 gallons per minute. Does anyone know what size drain pipe I will need? Standard shower drain in these parts is 2", but I'm worried that it won't be able to keep up.

    In my application the shower will drain from the p trap, travel ~2" then turn 90 degrees down where it will travel approximately 9' down vertically before it has to make 3 more 90 degree turns before it connects with the 4" main sewer line.

  2. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    An intermittent flow of 8 to 15 GPM is rated as 2 DFU, and a 2" drain is OK for that. However, I think that a 3" drain, or two, 2" drains, would be advisable just in terms of not ever being ankle deep in the shower.
  3. Sponsor

    Sponsor Paid Advertisement

Similar Threads: Draining Gallons
Forum Title Date
Shower & Bathtub Forum & Blog The downside to slow draining showers Aug 20, 2014
Shower & Bathtub Forum & Blog Slow draining bathtub Dec 12, 2013
Shower & Bathtub Forum & Blog attic addition draining Jan 25, 2010
Shower & Bathtub Forum & Blog Side draining bath tub Jun 3, 2009
Shower & Bathtub Forum & Blog Body spray draining Jun 17, 2008

Share This Page