GAC DLFC Size

Discussion in 'Water Softener Forum, problems, installation and r' started by shanlar, Oct 2, 2013.

  1. shanlar

    shanlar New Member

    Messages:
    16
    Location:
    Elk Grove, CA
    I am looking at installing a GAC Filter (CS-HAC) in a 12x52 (2.0 cuft) tank. What size DLFC would I need for my Clack valve?
  2. shanlar

    shanlar New Member

    Messages:
    16
    Location:
    Elk Grove, CA
    Would 9 gpm be a correct size for 2.0 cuft?
  3. ditttohead

    ditttohead Water systems designer, R&D

    Messages:
    1,789
    Location:
    Ontario California
    Pi r squared /144 x 10 = GAC backwash rate at 60 degrees. 10 is the gpm per square foot of bed area. GAC should be backwashed between 10-12 GPM per Sq. Ft.

    6x6x3.14/144x10 = 7.85 GPM. 8-10 GPM depending on water temperature.
  4. shanlar

    shanlar New Member

    Messages:
    16
    Location:
    Elk Grove, CA
    Awesome! Thanks ditto. Looks like 9 gpm would be sufficient and a happy medium.
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