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Thread: Adjusting suction...

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    Join Date
    Jul 2015
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    Tampa, FL
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    Adjusting suction...

    I recently decided that rather than continue to pay a poolguy to service my pool, I would take the time to read up on and understand whatwas actually going on in that mysterious container of green-blue water in mybackyard. Therefore, after reading quitea bit around the forum, I bought a test kit and started working on turning thegreen-blue into something that was at least clear a lot less green. I startedthe SLAM last Friday, and based on the numbers and the look of the water I think I should be at the "magical 3" in the next couple of days. Along the way, I started to understand a little bit about not only the chemistry but also the hardware, so...

    As I look at my pool's circulation system, I see what I believe to be the skimmer, a side-suction port (where the hose for the automatic cleaner attaches), and two main drains in the bottom of the pool. I currently have excellent suction on the side-suction port, with a bit less on the skimmer drain, and no detectable suction on the main drains. While I can increase /decrease the suction on the side-port and skimmer by adjusting the handles, I have yet to figure out a combination that brings the main drains in to draw anything. As I would like to get the mains involved in clearing out the post-SLAM debris, I thought Iwould see if anyone might have some pointers.

    Iím attaching a couple of pictures in case that will help in understanding my set up.

    002.jpg001.jpg
    10,000 Gallon Pebble Tec
    Hayward Star-Clear Plus C900 cartridge filter
    Hayward 1.5 HP pump
    Pool is filled from city water

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    Mod Squad JVTrain's Avatar
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    Re: Adjusting suction...

    The valve on the left looks like it's closed to left. That is, the suction line on the far left is closed off. Moving that valve handle so it's pointed downward should open suction to that line. What suction line is on the far left?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Re: Adjusting suction...

    JVTrain - That's the one I am guessing is the main drains - none of the lines were labeled - but since there is no suction down on the mains when it is open, I'm not sure.
    10,000 Gallon Pebble Tec
    Hayward Star-Clear Plus C900 cartridge filter
    Hayward 1.5 HP pump
    Pool is filled from city water

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    duraleigh's Avatar
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    Sebring, Florida
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    Re: Adjusting suction...

    Not all that unusual for the mains to be plugged of in a plater pool. Were they ever working to your knowledge?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Join Date
    Jul 2015
    Location
    Tampa, FL
    Posts
    18

    Re: Adjusting suction...

    Duraleigh - To be honest I never checked them - or anything else on the pool - before I joined the forum and fired my pool guy.
    10,000 Gallon Pebble Tec
    Hayward Star-Clear Plus C900 cartridge filter
    Hayward 1.5 HP pump
    Pool is filled from city water

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