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Thread: AG pump of IG use

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    launboy's Avatar
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    Jun 2008
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    AG pump of IG use

    Will an above ground pool pump work on an Inground hot tub? The actual water level on the tub will only be about even with the inlet of the impeller and all but about a foot of piping in front of the pump would be above water level.

    So my question is, if I install a check valve before the pump so the water can't flow back into the tub when the pump shuts down, once it's primed for the first time will it always be able to pull the water up the 3 inches to the strainer basket inlet? Also, this pump will be doing double duty as the pool filter too, so if I use the pool water to start the pump, then slowly switch over to the spa suction, will I lose prime?

    I guess the real question is, once primed, can an AG pool pump (1HP) keep itself primed and pumping water if it's like 2" above water level?

    Thanks,
    Adam
    18' x 42" Intex Easyset Pool, with 16' x 52" deep end in the middle. Approx. 5500 Gal.
    Hayward Power-Flo LX 1 HP, 100# Jacuzzi Brand Sand Filter(Piped underground so it looks nice) 8)
    3 - 2' x 20' Solar Pool Heater Panels(roof mounted)
    Goin' on 9 summers...NOBODY thought it would last this long.
    Buried Portable Spa sharing pumps and water with pool (Almost complete project)

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    JasonLion's Avatar
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    Re: AG pump of IG use

    Above ground pool pumps are generally not self priming and have lower maximum head than an above ground pump. If you can fill all the lines with water before turning on the pump and your plumbing has reasonably low total head then it should work.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    launboy's Avatar
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    Re: AG pump of IG use

    Thanks, I think I'll be alright then. The top of the strainer is maybe 4 inches above the water level and I'm going to put a check valve a foot or two away from the pump intake so the water can't go back down the line somehow(and to prevent water from backflowing from pool to spa).

    The pump will also be connected to an AG pool so if I do lose prime, I can use the pool water to start it, then slowly switch to the Spa(Inground).

    I don't think the head will be too high, although the solar heat 12 ft. up isn't helping. The suction is 3" (34' of pipe) up until about 2 ft. in front of the pump where it T's off to the spa pump. That last two feet is 2" PVC. The return is all 2" PVC (with 3 solar panels)and I'm using double 45* bends to make all 90's to reduce head. I think it should flow pretty well.

    Thanks,
    Adam
    18' x 42" Intex Easyset Pool, with 16' x 52" deep end in the middle. Approx. 5500 Gal.
    Hayward Power-Flo LX 1 HP, 100# Jacuzzi Brand Sand Filter(Piped underground so it looks nice) 8)
    3 - 2' x 20' Solar Pool Heater Panels(roof mounted)
    Goin' on 9 summers...NOBODY thought it would last this long.
    Buried Portable Spa sharing pumps and water with pool (Almost complete project)

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