Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: upsize/downsize/missized pump vs filter

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Edmond, Oklahoma
    Posts
    6

    upsize/downsize/missized pump vs filter

    About my pool: in ground 19' round vinyl. 8500 gals. no its not a converted above ground pool.
    Pump: Hayward superpump sp2605x7 3/4 HP
    Filter Pac-Fab (pentair) Tagelus TA-30D (30 gpm) Sand filter
    accessory: Polaris 165 pool sweep.

    equipment is 10-12 feet from pool.

    The pool is a older pacific pools in ground 19 foot round. est about 8500 gal. I think the pump is overpowering the filter. (silt frequent back-washing when using pool sweep)
    Should I go bigger filter or smaller pump? Downsize impeller to 1/2 HP? will I still be overpowering the filter at 1/2 HP?
    I figure about 45-50 GPM through a 1/2 HP pump or impeller.

    If what so what size sand filter?

    If I switch to cartridge, what size? with 3/4 HP or with 1/2 HP.

    Thanks




  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: upsize/downsize/missized pump vs filter

    Generally, we like larger filters. At 30 gpm, that filter is a little small. If you decide on a cartridge, you can literally go as big as you want......almost the same with a sand or DE but you have to have enough flow to backwash.

    So, I would get roughly a 60-70 gpm sand or DE. As large as you like on the filter. You will backwash/clean less often and your water will sparkle
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Jun 2015
    Location
    Edmond, Oklahoma
    Posts
    6

    Re: upsize/downsize/missized pump vs filter

    Will a 1/2 hp pump still be too much for the 30gpm sand filter? Looking for the most cost effective solution!

    I suppose a 3-way valve between the pump and cartridge filter is the best way to lower the pool level for winterizing and removing excess rain water (areal problem this year)?

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: upsize/downsize/missized pump vs filter

    I too would upgrade the filter to a larger size. But if you want to keep that filter, then get a 2-speed motor for your existing pump or a new 2-speed pump and just run in low all the time, except for backwashing.

    125 sqft minimum if you want to go with a cartridge filter and a 3-way would work well for waste.

    Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5

    Join Date
    Jun 2015
    Location
    Edmond, Oklahoma
    Posts
    6

    Re: upsize/downsize/missized pump vs filter

    Quote Originally Posted by jblizzle View Post
    I too would upgrade the filter to a larger size. But if you want to keep that filter, then get a 2-speed motor for your existing pump or a new 2-speed pump and just run in low all the time, except for backwashing.

    125 sqft minimum if you want to go with a cartridge filter and a 3-way would work well for waste.

    Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.
    Thanks, I've updated my sig and profile, if it shows up. Also, I'm wired for 110v, couldn't find a 2-speed 110v motor for a superpump
    8500 gallon 19' round vinyl IGP (Chlorine); 3/4 HP Hayward Superpump 110v; Hayward Star-Clear Plus C751 cartridge filter; Polaris 165 pool sweep.

  6. Back To Top    #6
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,486

    Re: upsize/downsize/missized pump vs filter

    If you have the SP2605x7, then the B971 will work or if you have the SP2607 the B973 will work. However, they are larger diameter than your current motor so you would need to make some modifications to the motor support. Some Superpumps had a removable shim while others require a support replacement.

    Or you could rewire for 230v.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  7. Back To Top    #7

    Join Date
    Jun 2015
    Location
    Edmond, Oklahoma
    Posts
    6

    Re: upsize/downsize/missized pump vs filter

    Thanks Mark. I'll research the possibilities. I've located a nearly new hayward c751 cartridge filter I'm considering.
    8500 gallon 19' round vinyl IGP (Chlorine); 3/4 HP Hayward Superpump 110v; Hayward Star-Clear Plus C751 cartridge filter; Polaris 165 pool sweep.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •