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Thread: Can someone please tell me what valve this is and if it should be on or off?

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    Can someone please tell me what valve this is and if it should be on or off?

    Hi,
    My pool is still filling with new water (got a new liner). Never ran the pool before. Before I start the pump and run it, where should the position of the red valve on the left side (filter height) be? It is currently on the off position..What is this for? Thanks,

    16x34 In-ground vinyl pool (22,000ish gallons), Sand Filter, K-2006 test kit, SWG

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    duraleigh's Avatar
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    Re: Can someone please tell me what valve this is and if it should be on or off?

    It's a bit of a guess but I think it is the waste water valve for backwashing. It should be closed just like it is.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad tim5055's Avatar
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    Re: Can someone please tell me what valve this is and if it should be on or off?

    My guess is the opposite. I think the backwash line comes out the back of the multi-port. It really can't be a backwash as water coming out of the multiport can go back into the pool without a second valve on the pipe to the left if it was that.

    I think that's a second return line going somewhere.... Waterfall, sheer decent, spa???
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Can someone please tell me what valve this is and if it should be on or off?

    Quote Originally Posted by tim5055 View Post
    My guess is the opposite. I think the backwash line comes out the back of the multi-port. It really can't be a backwash as water coming out of the multiport can go back into the pool without a second valve on the pipe to the left if it was that.

    I think that's a second return line going somewhere.... Waterfall, sheer decent, spa???
    hey, the pool has no waterfalls , spa or anything . Lol

    its really confusing. I guess I should just leave it off?
    16x34 In-ground vinyl pool (22,000ish gallons), Sand Filter, K-2006 test kit, SWG

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    Mod Squad tim5055's Avatar
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    Re: Can someone please tell me what valve this is and if it should be on or off?

    I would leave it off at first and see if all returns are working. Then the curious side of me would require turning it on and seeing if something changes of water starts squirting out somewhere.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Can someone please tell me what valve this is and if it should be on or off?

    Quote Originally Posted by tim5055 View Post
    I would leave it off at first and see if all returns are working. Then the curious side of me would require turning it on and seeing if something changes of water starts squirting out somewhere.
    haha done. Im excited to come home from work and fire this puppy up.
    16x34 In-ground vinyl pool (22,000ish gallons), Sand Filter, K-2006 test kit, SWG

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