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Thread: Backwashing problems!

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    Backwashing problems!

    I have a new pool (IG Gunite, 27,000 gallon). After heavy rains here in the Northeast I was told by the pool company to drain some water using the backwash feature on my Pentair Quad DE filter. So I do the backwash and really not noticing any dirty DE coming out...add DE to the skimmer and noticed it's coming out of the returns. I thought I might have done something wrong as this is my first attempt at this. Heavy rains again last night and again I do a backwash to rid the pool of water...again not noticing any dirty DE....add the new DE to the skimmer and it comes out of the returns again. Does anybody have any ideas of what is going on here? I don't think it should be coming out of the returns...pool is all cloudy now and I'm wondering what to do. Looks like the pool builder will be getting a phone call first thing in the morning!


    IG Gunite free form
    27,000 gallons
    Pentair Quad DE filter
    28,000 IG Free Form Gunite with quartz finish
    Pentair Quad DE filter, Intelliflo VS+SVRS
    Polaris 280, Sta-Rite 400K Heater-Propane

  2. Back To Top    #2

    Join Date
    Mar 2007
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    Coastalish 'down easter'
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    4,160

    Re: Backwashing problems!

    Welcome to TFP!!

    Did you turn off the pump before changing multiport positions? I fear you may not have

    What I suspect is that the 'spider gasket' a/k/a 'wagon wheel' gasket inside the multiport has become unseated (or possibly ruined ). It's a ~$15 part and you'll need to turn off the system and unscrew the 6 - 10 bolts that secure the top of the multi to check or replace it - but it's not hard to do at all

    We are here to help with this (there are a few posts on doing this, if you'd care to search for them, otherwise - we'll just tell you how to do it - if you have questions)

    I doubt it's anything other than the gasket and that's a simple repair
    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!)

  3. Back To Top    #3

    Re: Backwashing problems!

    Thanks for the reply but I have a plunger style handle....turn to open and pull up, push down and turn to close.
    28,000 IG Free Form Gunite with quartz finish
    Pentair Quad DE filter, Intelliflo VS+SVRS
    Polaris 280, Sta-Rite 400K Heater-Propane

  4. Back To Top    #4

    Re: Backwashing problems!

    Just an update....PB came to check out the DE problem and it turns out that the Quad DE filter was plumbed the wrong way and all the filters inside exploded and all the DE (well most of it) is in the pool now! So if you are in the market to get one of the Pentair Quad DE filters make sure your pb knows about the plumbing. So now the pb has to fix the plumbing and replace all the filters....good thing it happened quickly before we made our final payment!





    27,000 IG Gunite Free Form
    Pentair Quad DE filter
    28,000 IG Free Form Gunite with quartz finish
    Pentair Quad DE filter, Intelliflo VS+SVRS
    Polaris 280, Sta-Rite 400K Heater-Propane

  5. Back To Top    #5

    Join Date
    Aug 2009
    Location
    North Central Texas
    Posts
    1,358

    Re: Backwashing problems!

    Quote Originally Posted by mamasproject
    Just an update....PB came to check out the DE problem and it turns out that the Quad DE filter was plumbed the wrong way and all the filters inside exploded and all the DE (well most of it) is in the pool now! So if you are in the market to get one of the Pentair Quad DE filters make sure your pb knows about the plumbing. So now the pb has to fix the plumbing and replace all the filters....good thing it happened quickly before we made our final payment!
    27,000 IG Gunite Free Form
    Pentair Quad DE filter
    That is great advice. I've been researching the Quad and getting one very soon. The Quad, unlike most other DE filters, has the intake/output opposite what usual DE filters have. If you are getting a multiport valve for it you get one designed for Sand filters. On my current DE Filter, using the push pull valve, down is filter and up backwash. I haven't checked but I assume that the push pull valve for the Quad would be like one designed for a Sand filter. I know nothing about sand filters so I'm just making assumptions about that.

    Pentair says the Quad can only use so-and-so valves. There are very few choices if you search around for specific valves for the Quad. But the multiport ones I've looked at will sometimes say for "sand" and occasionally say "sand/DE". That is very confusing at first until you know why a certain type is needed and that's because of the reversed in/out on the filter.

    gg=alice
    1981, 25K, IG, Blue Plaster 1996, somewhat oval, widens a bit at shallow end, 1.5" pipes, 2" at Pad, 1 separate main drain, 1 skimmer, 4 returns + dedicated cleaner return, 10 ft deep end with very fast decline from shallow, Pentair Quad 80 DE, Pentair Intelliflo VF, 3/4 HP Booster Pump (equipment pad about 8 ft below top of pool), Challanger 3/4 Trash/Emergency Pump 120v, Polaris 280 (pressure), iRobot Verro cleaner (robotic), Aquabot Turbo (robotic), Jacuzzi Tracker 4X (vacuum) Pool Blaster (Buster), Two (2) PoolSkims, Solar Breeze (solar powered top skimmer) (beta to ver. 2, release date 2010), ColorSplash LED replacement bulb. Aries 550 gal separate spa, 2002 (our 3rd and BEST spa) , BBB-Bromine

  6. Back To Top    #6

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: Backwashing problems!

    There are 3 ways to plumb the Quad, no valve, a push pull valve, or a multiport vale.

    Here are the Pentair part numbers for each:

    No Valve Install kit: 270100

    Push Pull: 261165 PVC

    HiFlow Multiport: 261050

    Part numbers came right out of the 2009 Product Catalog. All menat for 2" plumbing.


    Scott
    PoolGuyNJ
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  7. Back To Top    #7

    Join Date
    Sep 2009
    Location
    Southern California
    Posts
    24

    Re: Backwashing problems!

    Quote Originally Posted by geekgranny
    The Quad, unlike most other DE filters, has the intake/output opposite what usual DE filters have. If you are getting a multiport valve for it you get one designed for Sand filters.
    Hello All,
    This seemed like a good post to tag onto considering the comment that the Quad DE has the intake/output reversed. I'm putting in a new Quad DE 80 Filter and I'm leaning to either:

    1) No Backwash valve
    or
    2) If I put one in I like the Jandy Backwash Valve P/N 8034 due to their Never Lube feature (I've read about all the issues with spider gaskets).

    What do you think of either approach?
    Best Regards, Tom
    IG 11,000 gallon 14'x30' Freeform Gunite Pool w/ 8' Spillover Spa, Pebble Fina Bella Blue Plaster, Pentair IntelliFlo VS Pump, Quad 80 w/ Fiber Clear Filter, Mastertemp 400HD Heater, IntelliTouch i5+3 w/ ScreenLogic App Controller, IntelliChlor IC40 Salt Cell, IntelliChem PH & ORP Controller w/ Acid Dispenser, IntelliBrite 5g Color Lights, Infusion Venturi Returns

  8. Back To Top    #8

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: Backwashing problems!

    I personally like the multiport for it's versatility. Next is direct. I do not like Push Pulls.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  9. Back To Top    #9

    Join Date
    Aug 2009
    Location
    North Central Texas
    Posts
    1,358

    Re: Backwashing problems!

    I had a push/pull on my old DE filter. It didn't have a lever as some do. When they get gritty it is hard to get them all the up or down and locked. You can replace a few parts but once the inside cylinder is roughened from grit and sand you might not even be able to get it apart to replace plunger or o-rings like mine for the last 4 years.

    I love my new multi position valve and would not want to be without one ever again. So many options you might not think you'll use but things change.

    gg=alice
    1981, 25K, IG, Blue Plaster 1996, somewhat oval, widens a bit at shallow end, 1.5" pipes, 2" at Pad, 1 separate main drain, 1 skimmer, 4 returns + dedicated cleaner return, 10 ft deep end with very fast decline from shallow, Pentair Quad 80 DE, Pentair Intelliflo VF, 3/4 HP Booster Pump (equipment pad about 8 ft below top of pool), Challanger 3/4 Trash/Emergency Pump 120v, Polaris 280 (pressure), iRobot Verro cleaner (robotic), Aquabot Turbo (robotic), Jacuzzi Tracker 4X (vacuum) Pool Blaster (Buster), Two (2) PoolSkims, Solar Breeze (solar powered top skimmer) (beta to ver. 2, release date 2010), ColorSplash LED replacement bulb. Aries 550 gal separate spa, 2002 (our 3rd and BEST spa) , BBB-Bromine

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