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Thread: Spa Draining Slowly

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    Join Date
    May 2017
    Fresno, CA

    Spa Draining Slowly

    When I purchased my used spa I attached a garden hose to the drain valve and turned it counter clockwise and water was coming out. I came back 5 hours later and the spa was still almost half full! Water was barley creeeping out of the valve. Bad valve or is this normal?
    Bestway AG Vinyl Oval
    18' x 9' x 48" ~ 3,548 Gallons
    Sand Filter & Solar Heater
    Elite Spa 86" x 87" ~ 350 Gallons
    TF-100 Test Kit

  2. Back To Top    #2

    Join Date
    Feb 2017
    Dahlonega, Georgia

    Re: Spa Draining Slowly

    It would not be normal. My first thought is debris blocking the water. If you have access to compressed air, and you're sure the blockage is not in the hose itself, you might try blowing out the drain tube from the exit side.
    Coleman Lay-Z-Spa inflatable spa (by Bestway), 210-230 gal, installed in garage, currently using the dichlor/bleach method, custom test kit which is essentially a Taylor K-2006 with Taylor K-1004 comparator block for pH, Speed Stir

  3. Back To Top    #3
    dsmith99's Avatar
    Join Date
    Jun 2016
    SW, Iowa

    Re: Spa Draining Slowly

    No idea what type of drain valve your spa has, mine has a drain valve built into the base. It is just a plastic cap screwed on, with garden hose threads, pulling outward on the cap or hose opens the valve. It's sort of recessed and awkward to get the cap off and the hose on without pulling it out and opening the valve. It's small and slow and it would probably take an hour to drain the tub that way.

    I use my weighted pool vac and hose to drain. I put the vac head in the footwell, push all the hose into the water until it's submerged and filled with water. Then put my hand over the end and pull it out of the hot tub. It will create a siphon and the large vac hose drains the tub fast. My tub is on an elevated deck, it creates a powerful siphon and drains 95% of the water really quick. This video illustrates it easily.

    Once it's flowing use the vac head or pull it off and use the end of the hose to suck out any dirt or sand that's in the bottom, just keep it submerged so you don't lose siphon. After the tub is mostly empty I pull the drain valve and let the rest of the water drain through that, probably less than 5 gallons.
    AGP 24' x 54" approx 14000 gal Full sun all day, Hayward 1.5 HP and EC50 D.E. filter
    Stenner 45MPHP10 10 gal/day fixed rate with intermatic ET1125C timer
    Dolphin E10 robotic cleaner, 330 gallon Tiger River Spa, Taylor K-2006C test kit

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