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Thread: DE Filter

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    DE Filter

    Can someone please provide directions to backwash using a DE filter (incl. how and where to add more DE)? And when is it necessary? Thanks!
    Carolyn

    22X44 freeform gunite with DE filter (44,500 gallons), 4 deck jets

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    Re: DE Filter

    Quote Originally Posted by maxsrents
    Can someone please provide directions to backwash using a DE filter (incl. how and where to add more DE)? And when is it necessary? Thanks!
    1. Turn the pump off.
    2. Make sure the backwash hose is attached, then unroll it (assuming you have a flexible backwash hose).
    3. Set valve(s) to backwash and turn the pump on and let it run for a couple of minutes.
    4. Turn the pump off. Set valve(s) to rinse. Turn the pump on and let it run for about 30 seconds.
    5. Turn the pump off, then set valve(s) to "filter". Turn the pump on.
    6. Add DE through the skimmer (how much to add depends on the size of the filter)
    Poor Man's Pool
    Doughboy 18 ft round above ground
    7600 gal with center drain
    Pentair sand filter, 1 HP pump
    50 ppm borates
    "I know just enough to be dangerous"
    Pool Calc Ver 1.41 (Excel)

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    I would suggest going through the "backwash / rinse " cycle at least 2, if not 3, times before returning to "filter". You will be surprised how much gunk comes through on the 2nd and 3rd cycles. Just make sure you "rinse" before going back to filter - this clears out the valve itself and keeps the DE and backwashed crud from ruining your spider gasket.

    Also, when you add DE, add about 75% or so of a full charge - no the full amount that your filter calls for. This info is in your filter manual somewhere, but it is normally buried. Some of the DE stays in the filter no matter how well you backwash, if you continually recharge with the full amount, the filter will gradually clog up.

    I add DE by filling a bucket about halfway, then adding half of my DE to the bucket, stir well and then pour into the skimmer. Add more water and pour in until the bucket is cleared. Then do it again with the 2nd amount of DE. If you just add the dry DE directly to the skimmer, quite a bit of it will go directly to the filter as "chunks" of dry DE and never do anything useful (I know this because I have cleaned out my filter when closing and I used to add DE this way).
    20 x 40 vinyl IG. SWG. Solar. Ikeric VS pump.

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    My sticky on DE filters is still a way off, but most of the info it will include cabe found here http://www.troublefreepool.com/viewtopic.php?t=981
    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

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    Thanks for the replies-its really appreciated! Waste-My DH is from CT & is a huge Huskies fan!!
    Carolyn

    22X44 freeform gunite with DE filter (44,500 gallons), 4 deck jets

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    Maxsrents - I'm from NJ (Tenafly) and it's nice to be able to help folks from my home state, BTW who isn't a big fan of WINNERS!!
    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

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  7. Back To Top    #7

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    Waste-I have a great idea-the next time you come home to visit -stop by and help me backwash!!
    Carolyn

    22X44 freeform gunite with DE filter (44,500 gallons), 4 deck jets

  8. Back To Top    #8

    Join Date
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    If I ever get to see your pool, I'll do you one better - I'll show you how to break it apart and REALLY clean it!
    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

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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