Bulkhead Flow Rate

Discussion in 'Filters, Pumps, etc..' started by Khalid, Aug 28, 2008.

  1. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
    what is the max flow rate for a one inch bulkhead? I am trying to run 710 GPH and have one hole already drilled into the tank. Is that enough?

    Thanks,

    Khalid :)
  2. Click Here!

  3. gazog

    gazog Kole Tang

    Joined:
    Nov 26, 2007
    Messages:
    1,788
    I think that it goes like this.

    3/4" - 300 gph
    1" - 600 to 700 max
    1.5" - 1400 to 1600 max
  4. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
  5. lunatik_69

    lunatik_69 Giant Squid

    Joined:
    Jul 10, 2007
    Messages:
    7,934
    Location:
    Miami, FL
    Are you sure about those rates? B/C I have a Magdrive 18 on a 1" drain bulkhead. Just curious. Luna
  6. gazog

    gazog Kole Tang

    Joined:
    Nov 26, 2007
    Messages:
    1,788
    everything I have read say that's the way it is.
    1 person likes this.
  7. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
    Thanks Luna :)

    So the one inch drain has worked for you with the Mag 18 with out any issues?
  8. Click Here!

  9. lunatik_69

    lunatik_69 Giant Squid

    Joined:
    Jul 10, 2007
    Messages:
    7,934
    Location:
    Miami, FL
    None what so ever, in fact, it can handle more flow. Luna
    1 person likes this.
  10. Otty

    Otty Giant Squid

    Joined:
    Nov 20, 2006
    Messages:
    6,465
    Location:
    Elizabethtown, IN
    Also enlarging the pipe size of the standpipe will cause more downflow pressure on the bulkhead and you can get more flow out of the tank.
    1 person likes this.
  11. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
    Nice!!! :) That means i don't have to drill any more holes ;D

    Thanks Luna, Otty, and Gazog for all your inputs i really appreciate it!;D
  12. Otty

    Otty Giant Squid

    Joined:
    Nov 20, 2006
    Messages:
    6,465
    Location:
    Elizabethtown, IN
    For a 1" bulkhead switch to a standpipe of 1.5 to 1.75 or even 2" to allow for more down force on the bulkhead.
  13. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
    sorry for the possible stupid question Otty but is the stand pipe the one on the outside of the tank that takes the water down to the sump or fuge?
  14. Click Here!

  15. Otty

    Otty Giant Squid

    Joined:
    Nov 20, 2006
    Messages:
    6,465
    Location:
    Elizabethtown, IN
  16. Khalid

    Khalid Plankton

    Joined:
    Jan 4, 2008
    Messages:
    24
    nice! thanks Otty ;D
  17. Otty

    Otty Giant Squid

    Joined:
    Nov 20, 2006
    Messages:
    6,465
    Location:
    Elizabethtown, IN
    Glad to help, done all the research already when I was building mine.
  18. veedubshafer

    veedubshafer Banned

    Joined:
    Aug 16, 2009
    Messages:
    558
    Location:
    Palmerton, Pennsyltucky
  19. Screwtape

    Screwtape Tonozukai Fairy Wrasse

    Joined:
    Sep 25, 2008
    Messages:
    2,289
  20. Click Here!

  21. veedubshafer

    veedubshafer Banned

    Joined:
    Aug 16, 2009
    Messages:
    558
    Location:
    Palmerton, Pennsyltucky
    Thats what I was figuring.
  22. horkn

    horkn Giant Squid

    Joined:
    Apr 4, 2009
    Messages:
    3,200
    Location:
    Cedarburg, Wi
    fwiw, this is what the REAL flow rates (maximum) are for these 2 sizes of PVC using schedule 40 pipe. Sch 80 flows a slight bit less.


    1" PVC is either 960 or 980 gph, either way much better than 300 or 600 from what some kits say, and 1.5" is right around 2000gph max.