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Thread: replace O ring

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    replace O ring

    I have a pentair 2000 SMBW and need to replace O-ring. We can't figure out how to remove the assembly to replace the O-rings.

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    Mod Squad Bama Rambler's Avatar
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    Re: replace O ring

    Which o-ring(s) are you needing to replace?
    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
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    Re: replace O ring

    Specifically, the one at the backwash, but when we removed the canister, all of the o-rings need to be replaced. The washer (is that the o-ring?) at the backwash valve is twisted and leaks. I've attached the diagram. I want to replace #5, which is the o-ring kit. Thanks
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    Mod Squad Bama Rambler's Avatar
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    Re: replace O ring

    If you look in the manual on page 12 there's a ring of bolts at the top of the valve that you have to remove to get the valve assembly off the filter body. You should be able to disassemble it from there.
    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: replace O ring

    We have removed the bolts and the bolt for the handle, but there is no obvious way to lift the assembly out. We tried putting the bolts in a little way and pulling with vise grips, but didn't even budge. Backwash handle moves easily, except for the twisted washer. But can't even slide a screw driver under the compression ring to lift it up.

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    Mod Squad Bama Rambler's Avatar
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    Re: replace O ring

    Are you lifting the body off the valve or the valve out of the body? The valve goes down away from the body.
    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: replace O ring

    I believe we are lifting the valve out of the body. The body, as I see it in the diagram, is the section above the handle with the 3 ports that go in from pool, and back out thru backwash or to the pool again. One of the things I did find said to remove the handle and put a board under it (the casing) then push up like using a lever. I do see in the diagram that it might work, but it's hard to reach to put the extension back on later. Of course, I've been warned that it might loosen or break the pipes if we do that. We haven't opened it up like this in the 10 years we've been here, so that could be very likely. I want to take out the part that moves with the handle and opens the different ports.

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    Re: replace O ring

    Pictures of the problem
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