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Thread: Perflex shaft o-rings

  1. Back To Top    #1

    Join Date
    Jun 2010
    Location
    Sewickley, PA
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    11

    Perflex shaft o-rings

    I disassembled my filter (Hayward Perflex EC40C75, bump DE) yesterday (see PSA below). I did what I needed, but I couldn't get the tube assembly entirely apart. I hope that someone who's done this before can give me a tip for next time.

    The tube assembly is built around a central shaft. Top to bottom, I've got:

    Hole in shaft for bump handle bolt.
    Smooth shaft
    Inset ring in shaft filled with an o-ring.
    About an inch of shaft
    Another identical inset ring filled with an identical o-ring
    Longer piece of shaft
    Ring in shaft for E-clip
    Washer
    Top tube plate
    Gasket and tube heads
    Bottom tube plate
    Washer
    Ring in shaft for E-clip
    Short trailing end of shaft

    What are the two o-rings for? I can figure out why one might be useful, to prevent water going up to where the bump handle connects, but not two. And how are you supposed to get the top tube plate over the o-rings??? I tried dry, wet, lubricated; it just wouldn't go.

    It's easy to remove the top E-clip, and if it weren't for the o-rings I could get everything apart that way. But I'm not sure I'll be able to remove (or put back) the bottom E-clip with the tubes there.

    Related Public Service Announcement: if you're suspicious of your filtering, it's really not that hard to get inside, and it's totally worth it. I inherited this filter from the house's previous owner. It wasn't properly reassembled at the end of last year, or else it had worked itself free: only five of the twelve tube bolts were connected! The other seven bolts were floating up top and the seven matching nuts were at the bottom of the drain area. Luckily, flushing the filter hadn't ever washed them out. I've been having trouble clearing up my cloudy water, and I think it's related to the ludicrous amount of DE I found caught in the filter this morning after fixing it... I think it's been dumping waste right back into the pool.
    Pittsburgh, PA
    16000 gallon AGP, Perflex EC40C75 DE filter, 1.5 HP pump

  2. Back To Top    #2

    Join Date
    Mar 2007
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    Re: Perflex shaft o-rings

    The 2 o-rings keep water from coming out of the top when the filter is running (they seal the hole in the lid that the shaft passes through)

    I always just remove the rings when reinstalling the shaft Then I check them for dry rot (replace if needed) lube them and reinstall (TIP - remove the bottom o-ring first and install the top o-ring first!)

    If getting the top E clip on gives you trouble, just let me know.
    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

    Join Date
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    Sewickley, PA
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    Re: Perflex shaft o-rings

    Quote Originally Posted by waste
    The 2 o-rings keep water from coming out of the top when the filter is running (they seal the hole in the lid that the shaft passes through)

    I always just remove the rings when reinstalling the shaft Then I check them for dry rot (replace if needed) lube them and reinstall (TIP - remove the bottom o-ring first and install the top o-ring first!)

    If getting the top E clip on gives you trouble, just let me know.
    How do you remove the o-rings? I didn't want to stick something under them in case I ripped them, but maybe they're stretchy enough?

    Getting the top E clip back on gave me terrible trouble the first time, took about an hour. The trick for me was to suspend the assembly (from the arms of two lawn chairs, only thing I had handy) so that there wasn't any weight resting on the tubes. Then I could individually press down each finger, and that brought the two plates a lot closer together. Afterwards I was able to tap the clip back into place with a screwdriver and mallet.

    I was totally right about my filter, btw. The pool's been cloudy for a week with the pump running 24/7... but today I could see it clear hour by hour. I can see the last of the DE on the pool bottom now and hope to vacuum it up tomorrow. Hooray!
    Pittsburgh, PA
    16000 gallon AGP, Perflex EC40C75 DE filter, 1.5 HP pump

  4. Back To Top    #4

    Join Date
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    Re: Perflex shaft o-rings

    I use a small 'precision' screwdriver - they've got enough stretch, unless they're dry rotted.
    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!)

  5. Back To Top    #5

    Join Date
    Jun 2010
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    Sewickley, PA
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    Re: Perflex shaft o-rings

    Thanks, belatedly - that worked like a charm.
    Pittsburgh, PA
    16000 gallon AGP, Perflex EC40C75 DE filter, 1.5 HP pump

  6. Back To Top    #6

    Re: Perflex shaft o-rings

    First post! Google led me to this message board, and this topic is exactly what I needed.

    New homeowners. Inherited the Perflex filter.

    I've taken the filter apart, but during re-assembly, I can't get that e-clip back on the top of the shaft. It's very close...it would go it I excluded the washer, but that sounds like a bad idea. When I place the washer on, and pull on the shaft as hard as I can, the groove in the shaft where the e-clip goes starts to peek through, but doesn't give me enough meat to grab onto. I just can't see any way I will be able to replace this!

    I did suspend the filter from two chair arms, as suggested by another user. I also individually pushed down each finger while suspended. Still no luck.

    Anyone have any helpful info on what I need to do/try?

    Thanks
    Ryan
    18k IG, gunite rectangular pool w/spa circa 1988, old Hayward Tristar 2HP pump, 2011 Pentair FNS PLS 48 DE filter, 2012 Pentair MasterTemp 400 NG heater, Kreepy Krawley suction side cleaner.
    Coming soon: Pentair Variable Speed Pump?, Automation Controls (to tie into home automation), led lighting when current lights fail, possible conversion to pressure side cleaner?, possible water slide feature?

  7. Back To Top    #7
    Isaac-1's Avatar
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    May 2010
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    Re: Perflex shaft o-rings

    Which model Perflex do you have, EC 40 style or EC 65/EC75 style?
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  8. Back To Top    #8

    Re: Perflex shaft o-rings

    Thanks for the quick reply...

    I have a EC65/75 model. I actually don't know which I have. The label on the tank gives the specs for both models (as I'm sure is typical), but there's no indication as to which. How are they differentiated?

    With that said, to clarify what I was doing:
    I put the bottom e-clip, washer and o-ring on the shaft and slid it in from below. Where does that lower o-ring ultimately sit? Maybe that's my problem? Maybe some lube to help it pass into the hole? Just a thought...

    Let me know what you think. Thanks so much...
    18k IG, gunite rectangular pool w/spa circa 1988, old Hayward Tristar 2HP pump, 2011 Pentair FNS PLS 48 DE filter, 2012 Pentair MasterTemp 400 NG heater, Kreepy Krawley suction side cleaner.
    Coming soon: Pentair Variable Speed Pump?, Automation Controls (to tie into home automation), led lighting when current lights fail, possible conversion to pressure side cleaner?, possible water slide feature?

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