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Thread: Pump is shot. Shopping for replacement...

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  1. #1
    mas985's Avatar
    mas985 is offline Lifetime Member Whizbang Spinner mas985 3 stars mas985 3 stars mas985 3 stars
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    Default Re: Pump is shot. Shopping for replacement...

    Technically, there is no pump on the market, except maybe an Intex, that is a correct size for your filter. Your filter has a max flow rate of 35 GPM but ideally, you should be around 21 GPM with that filter.

    However, the good news is that the Power LX 1 HP pump would provide about 49 GPM on high speed and about 24 GPM on low speed. So one option would be to replace the pump motor with a 2 speed motor and operate on low speed all the time.
    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

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    Default Re: Pump is shot. Shopping for replacement...

    With the short pipe run I have, my pump can do about 60 GPM, which is pointless if the filter can only do 35. I'm stepping down the HP 2 speed or not. Thanks for the input.
    Kevin
    15x30 oval AG Pool. Hayward Power-Flo Matrix 3/4 HP pump. Hayward 16" sand filter. Taylor K2006 test kit.

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    BigDave's Avatar
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    Default Re: Pump is shot. Shopping for replacement...

    I think mas985 is telling you that a 2 speed motor may be the only way to get as low as you need to go.

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    Default Re: Pump is shot. Shopping for replacement...

    Just ordered the 3/4 HP Hayward Matrix from Amazon. Might have to put in a new outlet. My old pump has a twist lock cord. Think the new one is standard 3-prong.
    Kevin
    15x30 oval AG Pool. Hayward Power-Flo Matrix 3/4 HP pump. Hayward 16" sand filter. Taylor K2006 test kit.

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    BigDave's Avatar
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    Default Re: Pump is shot. Shopping for replacement...

    Or you can change the plug. Twist-lock is code in my town. Consider plumbing in a valve between the pump outlet and the filter to throttle the flow - that's still too much pump for that filter.

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    CarlD's Avatar
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    Default Re: Pump is shot. Shopping for replacement...

    Twist-lock is code in my town, too, and the cord can't be more than 3' long.
    Carl

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    mas985's Avatar
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    Default Re: Pump is shot. Shopping for replacement...

    I wish you had checked in before purchasing. The 3/4 HP matrix has close to the same flow rate as the Powerflo LX 1 HP. 48 GPM vs 49 GPM so you really are no better off. This is why it is generally a mistake to size a pump by the label HP rating. You would have been better off with a two speed on low speed.

    BTW, how did you come to 60 GPM? That is much too high for that pump on such a small filter.
    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

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    Default Re: Pump is shot. Shopping for replacement...

    That is what is listed on the pump label. I will use a valve to throttle the flow rate.

    At some point I will post pics of the pool to see if anyone can ID what brand it is. Came with the house, wife won't let me tear it down. I still have to fix a leak around the skimmer. It never ends.
    Kevin
    15x30 oval AG Pool. Hayward Power-Flo Matrix 3/4 HP pump. Hayward 16" sand filter. Taylor K2006 test kit.

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    Default Re: Pump is shot. Shopping for replacement...

    Would this one work? Looks like the ends come off and can be threaded into the inlet.

    Kevin
    15x30 oval AG Pool. Hayward Power-Flo Matrix 3/4 HP pump. Hayward 16" sand filter. Taylor K2006 test kit.

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    Default Re: Pump is shot. Shopping for replacement...

    Inlet of the filter? I don't know if it would thread directly on - you'd probably need a threaded version of that valve and a nipple.
    I like ball valves for throttling. PoolDoc recommends gate valves because they're easier to operate.
    Hint: When you winterize, set the ball valves to 45 degrees - water is trapped in the valve body when it's open or closed.

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