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Thread: DE filter/canister help...

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    DE filter/canister help...

    New house with old filter, so I was told by pool store that the spent canister might explode if I back wash wrong... What the correct way?
    Turn system off
    open slide valve to back wash
    open spent canister red pvc valve
    turn system on?

    is there anything I do to canister bag or whatever is inside?

    then re add a little DE in skimmer

    Thanks for your help!

    ps when I have to open filter and take grids off when I hose down, is it hard to re assemble ?


    They are trying to sell the service, should I just have them do it? I cleaned cartridges before...





    http://www.youtube.com/watch?v=Lu7tNuQsZMY
    25k I/G ecostar ccplus Polaris plaster

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    Mod Squad Bama Rambler's Avatar
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    Re: DE filter/canister help...

    What brand and model is the filter?
    No matter, It's highly unlikely that you could do anything that would explode the filter. Your pool pump isn't designed to produce more pressure than the filter is rated for.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: DE filter/canister help...

    DE filters should only be completely taken apart and cleaned once a year.

    I know this is my first post but I have been cleaning pools for years and I love DE filters, they are way easier than cartridges (until you have to take it apart I guess). Do not let the service do it for you unless you like the price.

    MAKE SURE you never move the valve while the system is on because you will blow out your valve (I think that's the explosion you are talking about).

    1. Turn system off
    2. Switch to backwash
    3. When the sight glass looks clear turn system off again
    4. Switch to rinse
    5. When the sight glass is clear again repeat steps 1-4 until sight glass stays clear.
    6. Turn system off
    7. Switch to filter
    8. Add appropriate amount of D.E. to skimmer (should say how much to add on the filter).

    make sure drain valve is open of course

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    Re: DE filter/canister help...

    Ok sounds good, if it wasn't for that separate spent DE canister I would not be this hesitant. I don't have a rinse, its a old up/down slide valve.
    Tried to post video on this page, heres the youtube link
    http://www.youtube.com/watch?v=Lu7tNuQsZMY

    I should just replace, do you guys recommend Hayward sand or clean n clear 420 or bigger cartridges?
    30k spa solar 3/4hp pent air
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    Mod Squad Bama Rambler's Avatar
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    Re: DE filter/canister help...

    I don't know why you would want to replace a good filter. If the vessel isn't comprimised, there's not any real reason to replace it.
    All pool equipment is designed to handle more pressure than a pool pump can produce.

    I can't view YouTube vids here so you're better off posting pics.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    techguy's Avatar
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    Re: DE filter/canister help...

    I don't have a spent DE canister in my setup but as far as I know, the canister is only under pressure when you are rinsing the Spent DE into the canister. I don't know if the water is going to waste or back to the pool but either way, I don't think the canister sees a lot of pressure and it only sees water when you are changing the DE, once or twice a season for an hour? The pool services comment that if you wash it wrong it might burst seems like either a sales pitch or the desire to not have to "learn" how it works. Either way, I am not sure I trust them.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Re: DE filter/canister help...

    I'll give it a shot thanks?...

    so 1 hour if it returns to pool and a few minutes(or runs clear) if it is draining to waste?
    25k I/G ecostar ccplus Polaris plaster

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    Re: DE filter/canister help...

    I don't know if you are talkinga bout my comment but i have no idea how long to run the separator. I don't have one and have never used one.

    AFAIK, separators only see water when you are backwashing the filter and the water will back flow into the DE filter and the filter drains thru the separator. I don't know how it's plumbed into your pool.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Re: DE filter/canister help...

    Separation tanks are designed to work primarily with diatomaceous earth (D.E.) swimming pool
    or spa filters. Their purpose is to separate the D.E. and dirt from filter effluent during the
    backwash cycle. The separation process should produce water out of the separation tank
    suitable for return back to the pool or disposal into city storm drain systems. The separation
    process uses a large cloth “filter” bag to literally filter out the D.E. and its entrapped dirt
    particles. During backwashing of a D.E. filter, a valve is used to reverse the normal flow through
    the filter. The reverse flow dislodges the D.E. cake from the filter and flushes it into the top of the
    filter bag. The D. E. and dirt are captured in the bag and clean water passes through and exits
    from the tank bottom (outlet). After backwashing the filter, the separation tank needs to be
    opened and the bag cleaned before another backwashing cycle.
    http://www.pentairpool.com/pdfs/SeparationTankIG.pdf

    See if these instructions help.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Re: DE filter/canister help...

    Quote Originally Posted by techguy
    Separation tanks are designed to work primarily with diatomaceous earth (D.E.) swimming pool
    or spa filters. Their purpose is to separate the D.E. and dirt from filter effluent during the
    backwash cycle. The separation process should produce water out of the separation tank
    suitable for return back to the pool or disposal into city storm drain systems. The separation
    process uses a large cloth “filter” bag to literally filter out the D.E. and its entrapped dirt
    particles. During backwashing of a D.E. filter, a valve is used to reverse the normal flow through
    the filter. The reverse flow dislodges the D.E. cake from the filter and flushes it into the top of the
    filter bag. The D. E. and dirt are captured in the bag and clean water passes through and exits
    from the tank bottom (outlet). After backwashing the filter, the separation tank needs to be
    opened and the bag cleaned before another backwashing cycle.
    http://www.pentairpool.com/pdfs/SeparationTankIG.pdf

    See if these instructions help.


    Right on! thanks
    25k I/G ecostar ccplus Polaris plaster

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