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Thread: Replacing Pentair 1.5" multiport with 2" multiport

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    Join Date
    Jul 2015
    Location
    Pittsburgh, PA
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    98

    Replacing Pentair 1.5" multiport with 2" multiport

    I have a Triton II sand filter, with an old Pentair PacFab multi-port. The multi-port is 1.5", but when I had my pool redone they went with 2" piping everywhere. The plumbing stepped down to connect to the multi-port.

    I'm putting in a new heater and this morning in preparation to plumb I unhooked a junction which put a tiny bit of weight on the multiport piping and the multiport cracked. This was a sign that the plastic has become brittle and it's time for a new port.

    So the question is, can I just buy the Pentair Triton multi-port valve in 2" and hook things up?

    A second question is what will 2" piping everywhere buy me? Right now it's 2" except for the port which restricts flow to 1.5". My guess is with 2" I'll be able to filter slightly more water per hour without the restriction. Thoughts?
    In-ground 15x30 concrete pool with vinyl liner
    Triton II sand filter, Hayward Pump, Raypak 266 heater
    Rehab thread: Pool rehab, need advice

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,987

    Re: Replacing Pentair 1.5" multiport with 2" multiport

    So the question is, can I just buy the Pentair Triton multi-port valve in 2" and hook things up?
    Yes


    A second question is what will 2" piping everywhere buy me? Right now it's 2" except for the port which restricts flow to 1.5". My guess is with 2" I'll be able to filter slightly more water per hour without the restriction. Thoughts?
    Flow rate will increase some but energy use will increase as well.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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