Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Advice Please: confirm sizing / recomm's replacement motor?

  1. Back To Top    #1

    Join Date
    Jan 2009
    Plano, Texas

    Advice Please: confirm sizing / recomm's replacement motor?

    All - so I just finished my saga (also in this forum) of breaking down and apart my dead pump motor.

    I'm just planning to buy a new motor on line and install myself. This motor was installed about 4 years ago by an overzealous repair guy who picked a "much bigger and better" 2 HP -- and to the best of our memory, we used to have a 1/2 hp (which always had a lot more trouble priming).

    Here's my calculations -
    Pool volume (in gals) 16 ft w * 30 ft long * 4 ft deep + attached hot tub = 15500
    desired turnover (hours) = approx 6
    total in 24 hrs 62000
    GPM 43.06

    HEAD (EST. in feet)
    filter (Pac fab fns 48) 7
    Heaters (RP 2100) 15
    skimmers 5ft x 2 10
    returns 5ft x 2 10
    hot tub / jets 10
    fudge factor 5
    total head 57

    Based on this, I agree with several recommendations that a 3/4 HP would be fine. I'm looking at this pump - A.O. Smith Magnatek Square Flange UR 3/4 HP 56Y Pool Motor B852 -

    to replace this same model in 2 HP that's "burned up" - (i think this is it)

    My plan is just to order the new one and install it myself ASAP (since my pool is already green).

    Any advice?
    Anything I'm missing?
    Do I need to replace any other parts at the same time?
    Any good online stores that don't have to charge sales tax in Texas and free shipping?

    Thanks again for your help!!!

  2. Back To Top    #2
    spishex's Avatar
    Join Date
    Oct 2008
    Hillsborough, NC

    Re: Advice Please: confirm sizing / recomm's replacement motor?

    You'll need to get the corresponding 3/4 hp impeller to go with it.

Posting Permissions

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