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Thread: Pentair Multi-Port Valve Part Number for Old FNS Plus

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    Pentair Multi-Port Valve Part Number for Old FNS Plus

    Hi folks, hopefully someone here knows the answer...I did a search, but came up with different info vs. what Pentair shows on their website.

    I am replacing an old-school vertical slider backwash valve on my (2002-vintage) Pentair FNS Plus, 60 Vertical Grid DE filter.

    I want to replace it with a Pentair "high-flow" multiport valve.

    I'm trying to determine / confirm which Pentair Multiport Valve part number I need; From what I can tell from Pentair's website, the 261142 is the "high flow" version, for an FNS Plus. The inlet on my filter is at the bottom port. Is this the correct part number?

    I want to make sure, because I recall (and maybe I'm incorrect) something about there being FNS and/or FNS Plus filters, where the top port on the filter is actually the inlet, and not the bottom port?
    38,500 gallon free form pool, Gemstone finish by Burkett's, FNS Plus 60, Pentair Intelliflo Pump #011018, Solar, 12 4x12 panels w/Compool LX220....Soon to be adding automation.

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    Join Date
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    Re: Pentair Multi-Port Valve Part Number for Old FNS Plus

    De filters work by the inlet being the bottom fitting, sand filters work with the inlet fitting being the top one - this may be the cause for your confusion, the valves for the 2 different kinds are 180* opposite. The model # you gave will work for either the FNS or the FNS+

    If you need help rearranging the pad to better accept the multiport, post a pic of your set up and we'll give our best advice
    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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    Re: Pentair Multi-Port Valve Part Number for Old FNS Plus

    Thanks, Waste! That is what I thought. Once I start getting my "plan of attack" put together, I'll post up some details.
    38,500 gallon free form pool, Gemstone finish by Burkett's, FNS Plus 60, Pentair Intelliflo Pump #011018, Solar, 12 4x12 panels w/Compool LX220....Soon to be adding automation.

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