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Thread: Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

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    Join Date
    Mar 2015
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    East Moriches
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    Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

    OK FIRST----------My goal

    Adding diverters so I can bypass my heater when not needed (For example, when I first open the pool and at past the end of the season when I still run the filter prior to closing it for the year - I will not be using these diverters during the summer season. So they will be used to bypass the heater once in the beginning of season and once in the end.

    SECOND

    My brain hurts from my OCD searching...i've thrown in the towel trying to figure out why when I ALWAYS come across pictures of people bypassing their heaters they always use 3 diverter valves? For example in my first drawing I have 3 diverter valves b/c Im just resembling what I always see online. However, after thinking things thru for the 19th time why can't I just use 1 3 way and 1 diverter as I have in the 2nd drawing? I have a feeling I'm overlooking someone really obvious

    To try and answer my own question is it b/c diverter valves are not really isolation valves? If I go with the 3 way could I cause a little air leak possible in the system when I bypass the heater? If its minuscule and nothing to worry about i suppose i can do this 3 way idea as I'll only be utilizing it a few times a yearAttachment 58064Attachment 58065Attachment 58066

    Anyhow any help would be enormously appreciated.!!

    First pic is current setup (pipe is angled so I can walk up to the filter without having to step over it)
    2nd pic is 3 diverters and something I always see online
    3rd pic is setup ive thought of but NEVER can find online

    diverter.jpg

    diverter1 (2).jpg

    diverter1 (1).jpg


    And for those who are fixated on the lines on the feeder i do plan on moving it closer to the filter so the line is straight.. but its not a priority for me

    IMG_9374.jpg

    Again, if anyone has some good advice i say thanks in advance... !
    In ground 36x16 vinyl 17k gallons -Deep end reduced to 5 ft
    Hayward Heat Pump 110,000 BTU / Hayward Max-Flo VS Variable-Speed Pool Pump
    Hayward Top-Mount 24-Inch Sand Filter / Hayward CL200 Automatic Pool Chemical Feeder
    2 main drains and 2 skimmer boxes and 3 returns 2" lines

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    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
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    Re: Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

    The reason for 2 3-way valves is so that you can completely isolate the heater and even remove it if necessary while still being able to run the pump. With only one 3-way, you can only shut off the flow to the heater but not isolate it. It just depends on your objective.
    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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    East Moriches
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    Re: Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

    for some reason i just cant get this stuff to sink in... even if i had the one 3 way and 1 2 way i would still be able to remove the heater if necessary no? Either way the return to the heater is closed using the 2 or 3 way

    Maybe i should just stop over thinking and go with the 3 2ways... figured i save a few bucks going the 3 way route and have the DIY a little less time consuming (not really by much actually)

    Thanks again for the info though
    In ground 36x16 vinyl 17k gallons -Deep end reduced to 5 ft
    Hayward Heat Pump 110,000 BTU / Hayward Max-Flo VS Variable-Speed Pool Pump
    Hayward Top-Mount 24-Inch Sand Filter / Hayward CL200 Automatic Pool Chemical Feeder
    2 main drains and 2 skimmer boxes and 3 returns 2" lines

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

    Re: Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

    Yes you can use 1 3-way and 1 2-way if you want.
    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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    Join Date
    Mar 2015
    Location
    East Moriches
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    Re: Three (3) 2-way diverters vs one (1) 3-way and one (1) 2-way

    Quote Originally Posted by mas985 View Post
    Yes you can use 1 3-way and 1 2-way if you want.
    Thanks again
    In ground 36x16 vinyl 17k gallons -Deep end reduced to 5 ft
    Hayward Heat Pump 110,000 BTU / Hayward Max-Flo VS Variable-Speed Pool Pump
    Hayward Top-Mount 24-Inch Sand Filter / Hayward CL200 Automatic Pool Chemical Feeder
    2 main drains and 2 skimmer boxes and 3 returns 2" lines

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