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Thread: DE in Pool and Main Drain Question

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    DE in Pool and Main Drain Question

    I'm looking for some help with a problem I'm having. FYI, we did not install the pool. We bought our house last year and it was already here. I'm learning on the fly.

    The pool has been opened for a week. Ever since then, I noticed DE has been returning to the pool. After doing a search, I saw that one common reason was a hole in the filter screens. I took apart the filter and noticed that one of the screens had a hole in it. I ordered a new screen and installed it yesterday. I also added six pounds of DE to the skimmer baskets.

    I checked the pool today and the entire pool floor is covered in DE, when previously it was a light coating on the stairs by one of the returns. Before I go and replace all of the filter screens, are there any other possible reasons for this happening?

    Secondly, I used the pool broom to push the DE towards the main drain but it looks like the main drain is not working. When I close the valves to the two pool skimmers, the filter pressure drops to zero. My assumption is this should not happen if the main drain is working.

    Here are two pictures of my plumbing: http://imgur.com/Jd0SeeB and http://imgur.com/FfFVa

    From left to right the valves are labeled: pool main drain, waterfall, spa main drain, spa skimmer, pool skimmer #1, and pool skimmer #2. To further confuse the issue, the pump on the far left, which appears to be hooked up to both the pool main drain and the waterfall, only turns on when the waterfall is on (one hour a day). Could it be set up such that the main drain only works when the waterfall is on?

    Any help would be greatly appreciated.
    35,000 Gallon Gunite Pool/Spa
    Jandy DEL60 DE Filter
    Jandy AquaPure SWG
    2 Pool Skimmer / 1 Spa Skimmer
    Polaris 280

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    Richard320's Avatar
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    Re: DE in Pool and Main Drain Question

    Yes, it appears the booster pump feeds off the main drain and returns to the waterfall. So the DE won't be caught in the filter if you sweep it into the main drain. Looks like a manual vacuum job.

    DE getting past the filters can only be the multiport valve (unlikely) the screens, or the manifolds inside the filter. You didn't hear any cracking when you changed the one screen, did you?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: DE in Pool and Main Drain Question

    So if I'm understanding you correctly, the main drain does not go to the filter. The only function of the main drain is to provide water for the waterfall. If so, this is going to be a major hassle to clean up since the only vacuum I have is the Polaris 280 which works in a totally random path. Any idea what the hose faucet on top of the booster pump is used for?

    Regarding the DE filters, I did not hear any cracking. Since I'll need to take the filter apart again what should I be looking for?

    Thanks for the help.
    35,000 Gallon Gunite Pool/Spa
    Jandy DEL60 DE Filter
    Jandy AquaPure SWG
    2 Pool Skimmer / 1 Spa Skimmer
    Polaris 280

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    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: DE in Pool and Main Drain Question

    Quote Originally Posted by NeilH
    So if I'm understanding you correctly, the main drain does not go to the filter. The only function of the main drain is to provide water for the waterfall. If so, this is going to be a major hassle to clean up since the only vacuum I have is the Polaris 280 which works in a totally random path. Any idea what the hose faucet on top of the booster pump is used for?

    Regarding the DE filters, I did not hear any cracking. Since I'll need to take the filter apart again what should I be looking for?

    Thanks for the help.
    I use the faucet on mine to water the lawn to keep CH down. I think it was installed for pressure testing.

    Ask the neighbors. Maybe someone has an old fashioned manual vacuum and hose you can borrow for half an hour or so.

    Inside the filter, look for anything cracked, broken, not seated properly, split, or torn.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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