Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Pump Selection

  1. Back To Top    #1

    Pump Selection

    Looking for a replacement pump.
    From what I have read here a 1HP 2-speed pump would be more than enough for my needs.
    Pentair/Sta-Rite have the OptiFlo and Dynamo in 1HP 2 speed models.

    Pentair Dynamo 340204 - Sta-Rite Dynamo 340060SR
    Pentair OptiFlo 347990 - Sta-Rite OptiFlo 347991SR

    What are the real differences between them?
    Are there other pumps I should be looking at?
    Where to purchase online for a good price?

    Also, can anybody tell me what the GPM would be in low speed given a Head of 30-35? (filter psi is just over 13)
    All the charts show high speed flow with no mention of drop for low speed.

    This is my third season with this setup, the pool has been up and running since mid April.
    The pump just started turning itself off and on (overheating I believe).

    16'x28'x54" oval pool
    13200 gal
    Sand filter (2 sq feet, 150lbs, max 25 PSI)
    1 skimmer and 1 return
    Resin Matrix 24'X54" AG, 22" Sand Filter and trusty Intex SWG

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,486

    Re: Pump Selection

    What are the real differences between them?
    Head curves are slightly different but the main difference is in the pump basket. I like the Optiflo design better.

    Also, can anybody tell me what the GPM would be in low speed given a Head of 30-35? (filter psi is just over 13)
    The filter pressure and plumbing head loss is dependent on the pump you have now so once the pump is changed, the filter pressure and head loss will probably change so you really can't use the old's pumps numbers unless it is one of the pumps you are considering. However, on typical AG plumbing, both pumps will produce around 48 GPM.
    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

  3. Back To Top    #3

    Re: Pump Selection

    Thank you for your quick reply.
    Resin Matrix 24'X54" AG, 22" Sand Filter and trusty Intex SWG

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Pump Selection

    Welcome to TFP.

    I know a couple of Cormier's. One of them is named Bob!

    I'd listen to Mark if I were you. He knows his stuff!
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  5. Back To Top    #5

    Re: Pump Selection

    I have ordered the Pentair OptiFlo 347990. Hopefully it will pay for itself in about two years.
    Resin Matrix 24'X54" AG, 22" Sand Filter and trusty Intex SWG

  6. Back To Top    #6

    Re: Pump Selection

    Thank you for your comments.
    Resin Matrix 24'X54" AG, 22" Sand Filter and trusty Intex SWG

Posting Permissions

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