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Thread: Does a bottom drain help/make sense?

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    TimS's Avatar
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    Does a bottom drain help/make sense?

    My 24' round AG does not have a bottom drain. I have a skimmer, and one return. I have an EZ-Vac, but it tends to get stuck so I don't leave it in the pool all the time. It also doesn't seem to do that great a job anyway.

    (The following is where I am, and it may or may not really apply to my question. I'll leave that to the experts to determine. ) I'm still trying to find the optimal positioning for the return. Right now, I have it angled down about 45-55 degrees from horizontal, aimed away from the skimmer. It seems to work OK when the pool is open and uncovered, although the water moves so rapidly that a lot of the surface gunk doesn't get caught by the skimmer before it sinks. I'm still adjusting to see if I can find a position that keeps the water circulating well but keeps the surface movement slow enough to allow the skimmer to grab stuff from a bit further away (right now it can only pull from about 1.5-2" away as stuff floats by. Every few days, I turn the return to a greater angle, trying to find the right spot. Since the return is an Aqualuminator, the only adjustment I have is turning it. It doesn't have a true eyeball that I can aim more toward the middle or opposite side of the pool. The water flows out within about 10-15 degrees of the side wall.

    Now, the more relevant issue I have is that with the solar cover on, anything on the surface of the water (either under the cover, or along the edges where the cover pulls away from the wall slightly) doesn't move. It just sits until it starts to sink. Therefore, the skimmer doesn't really "skim" while the cover is on. With all the pollen, dust, seeds, etc flying around right now, a lot of stuff is getting into the pool. (Much less than if I didn't have a cover, but still a lot. Especially since I can't seem to get the cover off without dumping most of the stuff on top of it into the pool anyway.)

    Does it make any sense to build a pipe system that would pull from the bottom of the pool when the cover is on? My idea would be akin to putting the vacuum hose in the pool while the cover is on, but built out of PVC so that it's:
    a) rigid
    b) a shorter run than the hose would be
    c) has less flow resistance than the hose
    d) cannot get sucked onto the bottom of the pool

    The idea is to pull the water (and hopefully the gunk) from the bottom of the pool while the cover is on preventing the skimmer from pulling gunk from the surface.

    The pipe would fit onto the vacuum plate in the skimmer, and extend down near the bottom of the pool. It would only be in place when the cover was on. It would have a guard of some kind over it so that if the kids were to get into the pool with the pipe still in place, they would not be in danger of suction injuries.

    Is that a clear description? Does it make a bit of sense? Would it help keep the pool any cleaner at all?
    24' AG Round (vinyl replaced 0909) - 13500 gal - Sand Dollar Filter (150lb) - Dynamo DYNII-N1-1 1HP - Hayward HP380 Heat Pump - TF-100.
    Central Missouri

    Before I speak, I have something important to say.

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    Re: Does a bottom drain help/make sense?

    Let me think on this (like your avatar)

    Something is trying to perc up through the ganglia
    Luv& Luk
    -Ted

    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

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    JasonLion's Avatar
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    Re: Does a bottom drain help/make sense?

    Yes, and no. Yes, having a bottom drain, or something similar, is very nice in several ways. No, because adding liner penetrations to an above ground pool when you don't have to is asking for trouble. Each liner penetration is a risk. The more you have, the more likely there will be problems eventually.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Does a bottom drain help/make sense?

    With pollen etc collecting on the cover, one option is to use a garden-hose sprayer to hose off the cover, but you spray toward the skimmer, so all the yucky stuff goes (more or less) straight into it. If you do this before you take the cover off, then you don't dump as much dirt into the pool.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
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    TimS's Avatar
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    Re: Does a bottom drain help/make sense?

    Quote Originally Posted by JasonLion
    Yes, and no. Yes, having a bottom drain, or something similar, is very nice in several ways. No, because adding liner penetrations to an above ground pool when you don't have to is asking for trouble. Each liner penetration is a risk. The more you have, the more likely there will be problems eventually.
    For this concept, there isn't an additional liner penetration. What I have in mind is a pipe that would mount to the vacuum plate in the existing skimmer, and exit the skimmer into the pool through the skimmer mouth. This is a temporary, removable setup that would only be used when the cover is on.

    Quote Originally Posted by PaulR
    With pollen etc collecting on the cover, one option is to use a garden-hose sprayer to hose off the cover, but you spray toward the skimmer, so all the yucky stuff goes (more or less) straight into it. If you do this before you take the cover off, then you don't dump as much dirt into the pool.
    --paulr
    I've tried that once so far, and was somewhat successful. Since my deck only goes halfway around the pool, it's tricky to get the water to flow all the way across to the skimmer. It's a bad angle, and I have to keep getting down off the deck and walking around to the far side of the pool, dragging the hose with me. Back and forth several times. Yuck. Especially since the cover never lays completely flat and always has some air bubbles under it, which diverts the spray, and always in the wrong direction.
    24' AG Round (vinyl replaced 0909) - 13500 gal - Sand Dollar Filter (150lb) - Dynamo DYNII-N1-1 1HP - Hayward HP380 Heat Pump - TF-100.
    Central Missouri

    Before I speak, I have something important to say.

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