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Thread: SWG advice for large pool

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    SWG advice for large pool

    I am building a pool that will be about 36,000 gallons. I will probably have a Pentair variable speed pump and a sand filter. Based on the size of my pool does anyone have recommendations for a pool this size or larger that you use a SWG for.

    Not tied to any brand personally.

    -Mickey

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    JoyfulNoise's Avatar
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    Re: SWG advice for large pool

    If you're already getting Pentair equipment then you might as well get an IC60 and pair it with an EasyTouch 8 automation panel. The IC60 puts out about 2lbs of chlorine per 24 hour period which equates to 6.7ppm FC per day. You'll have to use bleach to get your pool dosed up to the proper target level but the IC60 should be able to supply the 2-4ppm per day needed to account for FC loss. The down side is you'll be ruining your pump close to 24/7 so you'll want a variable speed pump for maximum electrical efficiency.

    You might want to consider a bleach dosing pump (Stenner pump) instead to save on pump run time.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: SWG advice for large pool

    I am in the same boat Mickey and I was going to go with an IC60 as well.

    I'm now concerned about the pump. I'm not sure mine is variable speed and I am wondering about my electric bill again! Sigh!

    EDIT: I get full sun and usually about 1-2 points of loss per day.
    20x40 L-shape 35k gallons, Pentair FNS 60 SQFT DE Filter, Pentair Multi-port Valve, Hayward Super Pump w/1 glorious HP, Vinyl Liner, Dolphin Z5, TF-100 w/Speed Stir

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    Mod Squad jblizzle's Avatar
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    Re: SWG advice for large pool

    Quote Originally Posted by JoyfulNoise View Post
    If you're already getting Pentair equipment then you might as well get an IC60 and pair it with an EasyTouch 8 automation panel. The IC60 puts out about 2lbs of chlorine per 24 hour period which equates to 6.7ppm FC per day. You'll have to use bleach to get your pool dosed up to the proper target level but the IC60 should be able to supply the 2-4ppm per day needed to account for FC loss. The down side is you'll be ruining your pump close to 24/7 so you'll want a variable speed pump for maximum electrical efficiency.

    You might want to consider a bleach dosing pump (Stenner pump) instead to save on pump run time.
    Matt, you kind of contradict yourself here ... If the SWG can add 6.7ppm and the pool need 2-4ppm ... then they would only have to run the pump 8-14 hours, which is still a lot but, certainly better than 24/7
    Jason, TFP Moderator
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    JoyfulNoise's Avatar
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    Re: SWG advice for large pool

    Quote Originally Posted by jblizzle View Post
    Matt, you kind of contradict yourself here ... If the SWG can add 6.7ppm and the pool need 2-4ppm ... then they would only have to run the pump 8-14 hours, which is still a lot but, certainly better than 24/7
    That was my point, however inarticulately made. The pool volume is on the high end, so the OP needs to run the pump for a better part of the day to keep chlorine levels up. Just trying to raise awareness that if your pool volume is high, then getting an energy efficient pump, like a variable-speed pump, is something to consider.

    Next time I'll put down the hamburger before responding or wait until after lunch
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: SWG advice for large pool

    Yeah, it sounds like JoyfulNoise that I am in the same boat and could also use an Intelliflo as well. I might want to spec this in to save costs.
    20x40 L-shape 35k gallons, Pentair FNS 60 SQFT DE Filter, Pentair Multi-port Valve, Hayward Super Pump w/1 glorious HP, Vinyl Liner, Dolphin Z5, TF-100 w/Speed Stir

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    JoyfulNoise's Avatar
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    Re: SWG advice for large pool

    Quote Originally Posted by pisymbol View Post
    Yeah, it sounds like JoyfulNoise that I am in the same boat and could also use an Intelliflo as well. I might want to spec this in to save costs.
    You can also look at 2-speed pumps which are much cheaper. As long as the 2-speed pump has enough HP to produce the minimum flow rate needed for the SWG at low speed, then it's a cheaper option than the more expensive VSPs. VSPs don't typically pay for themselves in the long run unless you live in a place where the utility rates are very high.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: SWG advice for large pool

    What would you consider high utility rates?

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    Re: SWG advice for large pool

    Disregard. I called to get our rates and they are low (about 0.09 per kWh). That's good!

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    JoyfulNoise's Avatar
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    Re: SWG advice for large pool

    Quote Originally Posted by wmmallette View Post
    Disregard. I called to get our rates and they are low (about 0.09 per kWh). That's good!
    In that case, a 2-speed pump would be a good trade-off unless you're willing to pay a premium for all the controls and scheduling that goes with a VSP. In a new build, if you're going with an automation system you might as well get the VSP since the cost differential is so minor compared to the overall cost of a pool build. If, however, you need to contain costs or have a strict budget, then a 2-speed is the way to go.
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: SWG advice for large pool



    Awesome. I dont how important automation is. I have considered it for muratic acid dispensing potentially, but really other than that its not a big deal. I'd probably spend my money on a good pool cleaner or landscaping.

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    Re: SWG advice for large pool

    Can the original poster put 2 IC-60's in series and cut the pump run time in 1/2?
    35,000 Gal. - 40x20x8 - Plaster - SWG Pentair IC 60 - Barracuda G3 Vacuum - Hayward c1750 Cartridge Filter - Blue Torrent VS 1.5hp pump - Pool is 45 years old.

    "I'd build a deck over my pool if I didn't have a SWG"

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    Mod Squad jblizzle's Avatar
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    Re: SWG advice for large pool

    Quote Originally Posted by Philo View Post
    Can the original poster put 2 IC-60's in series and cut the pump run time in 1/2?
    Yes.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: SWG advice for large pool

    Good to know. I will probably start with one 60,000 gallon sized SWG and see how this first year goes, but knowing that putting another SWG in-line later is good information.

    If I ever did that, would it have to be another SWG of the same size? Could I put an IC60 and an IC40 together? Or same question on other brands as well?

    -Mickey

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    Mod Squad jblizzle's Avatar
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    Re: SWG advice for large pool

    The 2 SWGs would basically be independent, so I see no reason you could not mix and match brand and/or size.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Re: SWG advice for large pool

    doubt i would mix brands unless i had really bad experience with my first one, but may be tempted to mix sizes

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