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Thread: Pump and filter questions

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    Pump and filter questions

    I have an above ground pool that is about 20,000 gallons. It came with a 1.5hp Astral pump and a sand filter, which I do not know it's size. I run this pump for 2 four hour session each day during the season. This causes a significant rise in the electrical bill. I have been thinking of replacing it with a smaller pump, but I am not sure what size to get, or if I need to replace the filter as well.

    When I opened the pool this season, the pump is squealing as if it is about to die. It has been running 24/7 for 2 weeks during the opening phase, however. So I feel as if I am going to have to do something soon. The local pool store discouraged me from getting a 3/4hp and said not to go any smaller then 1hp. I only have one return on this pool and it shoots like a rocket.

    So, can I just replace the pump with a smaller one? How small?
    Or, do I have to get a properly matched filter as well? How do I determine the size of my existing filter?
    Hurricane Rita did not kill me, but she killed my pool!

    Intex 36'X18'x52" "elliptical pool"/ Hayward 220 filter/1HP pump 14,364 gal, or so

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    Join Date
    May 2008
    South Jersey
    While I can't comment on the sizing of the pump (there are many others on here that I'm sure will give you good advice) I can tell you that a pool store might not be the best place to get a motor. When mine went bad (sqealing lead to siezure) I found a company that specialized in electric motors. I took my motor in and got a replacement for MUCH less than what the pool store was asking for lesser quality motor.

    I don't know if this is the norm or not, but that was my experience.

    17x35 Inground Vinyl Liner
    26,000 Gallons
    Nautilus DE Filter
    Pacfab Challenger Pump

  3. Back To Top    #3

    Join Date
    Mar 2007
    Coastalish 'down easter'
    Sean, your experience, unfortunately, is typical

    Thewayne, without even knowing the size of the filter I will tell you to get the 3/4 hp motor - you don't need the whole pump - a motor 'swap out' is fairly easy if you have the tools to do it and are even slightly handy. The smaller motor will save you $ on electricity and will surely be sufficient for your pool (and probably allow for better filtration!) If you get just the motor as I suggest, also pick up a new "shaft seal assembly" - those things don't react well to being removed and reinstalled and can cause real trouble (like needing a new motor) if they fail

    This is a busy time of year for me, but I always try to keep track of the folks I've offered advice to, so if you have any questions about doing the change-out, just ask and I'll help you as much as I can without actually being in your yard
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    Luv& Luk

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  4. Back To Top    #4
    Where should I look for one of these motors, and what brand?
    Hurricane Rita did not kill me, but she killed my pool!

    Intex 36'X18'x52" "elliptical pool"/ Hayward 220 filter/1HP pump 14,364 gal, or so

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