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Thread: piping in a pentair vs pump

  1. Back To Top    #1

    Join Date
    Mar 2012
    Eastern Long Island,New York

    piping in a pentair vs pump

    Is there a preferred fitting for the initial fittings on this pump? I know some web sites recommend the pentair union, buy I was wondering what else can be used. The rest of my piping is 1 1/2". If I use a 2" nipple into/out of the pump instead of the union I can put a 2" coupling on the nipple and put the 1 1/2" bushing into that and continue. Is this ok or is there a better way?
    20 X 40 Vinyl IG 28K gallons, Heat Siphon Z700HP, Hayward 4820 DE, Hayward SP3400VSP, Jandy aquapure 1400, TFTest Kit, Pool School, Pool Calculator

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: piping in a pentair vs pump

    I think it is always a good idea to put unions on the pump so that you can easily remove it if you need to work on it without having to re-plumb. There are some folks here that do not like unions. I got lucky and my new Pentair Superflo came with the union fittings to the pump.

    The risk with using a screw in fitting is that you may find out after the fact that it did not seal well ... then you have no choice but to cut the plumbing out and start over if you do not have a union.

    I just redid my pad and found I had a leak where one of the screw in fittings went into the filter multi valve. Luckily I had added unions there too, so just had to open the union and tighten some more.
    Jason, TFP Moderator
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  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: piping in a pentair vs pump

    I am one of the "don't like unions" people. I would just use half of a 2" CPVC nipple (i.e. threaded on one end) and a reducer to 1.5" and continue with 1.5" from there.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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