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Thread: Tweeking my pump run time for the fall/winter?

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    AaronGo's Avatar
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    Tweeking my pump run time for the fall/winter?

    Now that fall is upon us in Houston (nothing compared to you Northerners) and we won't be using the pool until next spring, should I consider slightly decreasing the run time for our pump or just stick with the general idea of circulating all the water through the filter once within 8-12 hours?

    I have been running the pump from 9 am to 7 pm since we got the pool finished in early summer with no issues, so not trying to fix something that is not broken.

    Thanks in advance!
    18,000 gallon in ground, plaster - completed 6/29/12
    Jandy 340 sq ft cartridge filter
    Jandy variable-speed 2 HP pump
    Jandy LXi 400 heater
    Jandy Aqualink PDA-PS4

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    Christian's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    It's more a matter of personal choice than anything. I deal with people who get one rotation per 24 hour period and are perfectly happy. The bonus is that if it's under 60 degrees F algae won't grow so you only really need minimal circulation.

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    Re: Tweeking my pump run time for the fall/winter?

    I also am in Houston, and just turned my down to about half of what I had it for summer. It didn't use much power in the first place, but it's not really necessary anymore.

    According to a spreadsheet I worked up, i get about 2.25 turnovers a day for $25/month at 80% low speed, 20% high speed. Been about a week and pool is still sparkly.

    Paul

    BTW - I have basically 4 different run times programmed - A low/high speed in the morning, and a low/high speed session in the evening.
    15,000 gallon colored plaster in-ground with spa-spillover
    Hayward Tristar 2-speed 1.5hp main, Hayward Tristar 1 speed 1hp water feature
    Hayward Cartridge Filter C4030 & Tiger Shark
    Hayward ProLogic Automation & Hayward 400k BTU Heater
    Stenner 45MPHP10 Peristaltic Pump

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    BoDarville's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    Quote Originally Posted by Christian
    It's more a matter of personal choice than anything.
    That's my take on it as well. This time of year with the cooler water and nighttime lows well above freezing, I run the pump manually on an as-needed basis (defined as when I add any chemicals, if the water needs filtering, or the pool needs vacuuming). Note that I have a single-speed pump. If I had a 2-speed or variable speed pump, I might do some further experimenting. Bottom line: Do what works well for your pool.

    Once winter sets in and we begin getting some below freezing temps at night, then the freeze guard will run the pump for freeze protection purposes. Filtration becomes a secondary concern at that point.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    Quote Originally Posted by houstonTex
    According to a spreadsheet I worked up, i get about 2.25 turnovers a day for $25/month at 80% low speed, 20% high speed. Been about a week and pool is still sparkly.
    Where did you get the flow rate for the pump? Depending on your plumbing setup, it is probably less than 100 GPM. Also, low speed is usually always around 1/2 of high speed to within a few percent.
    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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    Re: Tweeking my pump run time for the fall/winter?

    Hayward has a data sheet somewhere that I pulled that from. Head vs flow for various pumps (& speeds where applicable). I wasn't **** bent on being 100% accurate, +/- 10% or so is fine for my purposes. I mean, we'd be talking a linear coefficient vs an order of magnitude, so I'm OK with what I have on that sheet.

    Flow rate is definitely less than that when going through the spa plumbing, but I have a big cartridge filter so pumping through the pool it's in the right neighborhood.
    15,000 gallon colored plaster in-ground with spa-spillover
    Hayward Tristar 2-speed 1.5hp main, Hayward Tristar 1 speed 1hp water feature
    Hayward Cartridge Filter C4030 & Tiger Shark
    Hayward ProLogic Automation & Hayward 400k BTU Heater
    Stenner 45MPHP10 Peristaltic Pump

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    Re: Tweeking my pump run time for the fall/winter?

    15,000 gallon colored plaster in-ground with spa-spillover
    Hayward Tristar 2-speed 1.5hp main, Hayward Tristar 1 speed 1hp water feature
    Hayward Cartridge Filter C4030 & Tiger Shark
    Hayward ProLogic Automation & Hayward 400k BTU Heater
    Stenner 45MPHP10 Peristaltic Pump

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    I suspect that you are more than 30% off. What is your filter pressure and what size pipe do you have?

    A typical pool with 2" plumbing, the SP3210X152 would have an operating point close to 88 GPM @ 63' of head.

    The SP32152EE would have an operating point close to 92 GPM @ 69' of head.
    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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    Re: Tweeking my pump run time for the fall/winter?

    I have a high HP pump so I get a turnover about every 1 1/2 hours. I go from about 7 hours a day (in two sessions) during the summer to about 5 hours a day during the winter. I probably could go even less.
    9,200 gal. Gunite Luna Quartz French Grey pool with spill over spa, two fountains on tanning ledge (rarely used)
    Pentair Whisperflo 2HP, Pentair CCP Cartridge 420 Sq. Ft., Polaris 280 with booster pump
    Pentair EasyTouch 4, RayPak LoNox 266k Natural Gas heater, Aqua Rite SWCG T Cell 9, Borates, TF-100 test kit

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    Re: Tweeking my pump run time for the fall/winter?

    OK. Still gets the job done at 6hrs total (80:20 L:H). Thanks.
    15,000 gallon colored plaster in-ground with spa-spillover
    Hayward Tristar 2-speed 1.5hp main, Hayward Tristar 1 speed 1hp water feature
    Hayward Cartridge Filter C4030 & Tiger Shark
    Hayward ProLogic Automation & Hayward 400k BTU Heater
    Stenner 45MPHP10 Peristaltic Pump

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    Re: Tweeking my pump run time for the fall/winter?

    I'm in Houston as well and as soon as the water is too cold to swim in I cut the pump time in half. If the spa gets used I will manually run it a little longer.
    14,000 gallon IG plaster pool, Cartridge Filter

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    Re: Tweeking my pump run time for the fall/winter?

    Hey, I'm in Houston too! This is not a hijack of the original question, but an expansion, I hope no one minds.

    1. How does one calculate how long it takes for the pool to make one whole circulation?

    2. The manual states that if the temps go below 51°F, we should not use the SWG. Am I correct in assuming that's the water temp and not the air temp?? Low temps this week are supposed to go into the 40s.

    3. But I should still keep the pump running for a few hours a day, depending on the answer to question 1 above?

    4. Should I put chlorine tablets (leftover from new pool startup in the summer) into the chlorinator (a translucent green tube) that's hooked up to the system if I'm not using the SWG?

    Thanks.
    <12,000 gallons, IG white plaster, 1HP Pentair WhisperFlo pump for pool, 2HP Pentair WhisperFlo pump for spillover spa when in spa mode, 1½HP Pentair WhisperFlo pump for 2 Sheer Descents, Pentair Booster Pump for Polaris 280, Pentair FNS Plus DE Filter, Jandy Aquapure SWG, Pentair MasterTemp Natural Gas Pool and Spa Heater, AND a waterproof hand-held remote control. Taylor K-2006 Test Kit

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    Re: Tweeking my pump run time for the fall/winter?

    I forgot. We are tentatively heating the pool, until we get our gas bill! So, if the temp of the pool stays above 70°F, I should still use the SWG whenever the pump is running?
    <12,000 gallons, IG white plaster, 1HP Pentair WhisperFlo pump for pool, 2HP Pentair WhisperFlo pump for spillover spa when in spa mode, 1½HP Pentair WhisperFlo pump for 2 Sheer Descents, Pentair Booster Pump for Polaris 280, Pentair FNS Plus DE Filter, Jandy Aquapure SWG, Pentair MasterTemp Natural Gas Pool and Spa Heater, AND a waterproof hand-held remote control. Taylor K-2006 Test Kit

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    1. There are several methods from a very rough calculation to very labor intensive methods. The more accurate you try to be, the more information that is needed. If you want a rough estimate, give me the pump model #, and a rough description of your plumbing, sizes, lengths, # runs, etc.

    2. Most SWGs will shut off by themselves but yes, it is water temp.

    3. You can continue to run the pump although when the SWG shuts off, I will usually shut off my pump until it warms up again.

    4. I don't because when the water is that cold, you really can't get much in the way of algae but that is what works for me. Your situation could be different. If you do shut off the pump, just keep an eye on the water and if it starts to turn green or cloudy, it is time for pump run time and chlorine.

    5. Yes
    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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    Re: Tweeking my pump run time for the fall/winter?

    Thank you for trying to help me. This is the best site ever.

    I can give you the pump model number:
    Pool:Pentair Whisperflo #177475.
    Spa:Pentair Whisperflo #186237
    Sheer Descent: Pentair Whisperflo #177476
    In the manual is a very nice graph called Pump Curves. I'm a bad Chinese---Math makes my eyes glaze over! I don't know how to read it.

    I don't understand the other things on your list!
    Plumbing I'm sure it's 2-inch white PVC.
    Lengths?? Do you mean from the pump to the closest skimmer? Not far, about 8 feet.
    # runs?? I really don't know what this means. LOL

    My small pool is L-shaped.
    The swimming/playing section is 25 feet long by 12 feet wide. Depth runs 3½feet to 4½feet, most of it being 4feet deep.
    The other part of the L is taken up by the spillover spa which is probably 8x8feet square: and a sun deck of 12feet by 4feet by 9inches deep.
    <12,000 gallons, IG white plaster, 1HP Pentair WhisperFlo pump for pool, 2HP Pentair WhisperFlo pump for spillover spa when in spa mode, 1½HP Pentair WhisperFlo pump for 2 Sheer Descents, Pentair Booster Pump for Polaris 280, Pentair FNS Plus DE Filter, Jandy Aquapure SWG, Pentair MasterTemp Natural Gas Pool and Spa Heater, AND a waterproof hand-held remote control. Taylor K-2006 Test Kit

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    For some pools, each skimmer and main drain is brought back on it's own pipe run while other pool setups combine the pipes near the pool and only run one pipe back. So by # runs, I am interested in the number of suction/return lines that go from the pad to the pool. Having multiple lines will reduce head loss.

    One other item that would help would be the filter pressure.
    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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    Re: Tweeking my pump run time for the fall/winter?

    Hello Mark,

    Looks like each item has one pipe coming and one pipe going, every pipe is labelled---pool, spa, main drain, skimmers, cleaner, waterfall---and also with arrows showing direction of the water flow. The only thing that has only one pipe is the spa blower. Is this what you mean? I'm sorry to sound so "not very bright." There were a lot of pipes laid in the ground when the pool was being built, all the way from the pad to the pool.

    The pressure gauge on the DE filter says 15. That's the "start."
    "Clean filter" mode is not till 25.

    Thanks for "holding my hand."
    Yan
    <12,000 gallons, IG white plaster, 1HP Pentair WhisperFlo pump for pool, 2HP Pentair WhisperFlo pump for spillover spa when in spa mode, 1½HP Pentair WhisperFlo pump for 2 Sheer Descents, Pentair Booster Pump for Polaris 280, Pentair FNS Plus DE Filter, Jandy Aquapure SWG, Pentair MasterTemp Natural Gas Pool and Spa Heater, AND a waterproof hand-held remote control. Taylor K-2006 Test Kit

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    My best estimate would be around 80 GPM for a turnover of 2.5 hours.
    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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    Re: Tweeking my pump run time for the fall/winter?

    Thank you. I didn't realise it was so fast. How do you work it out?

    When the pool was first finished in the summer, the pool builder had set the pump run time from 6am to 6pm. Now I've got it running from 9am to 7pm. I haven't shortened the run time by much because we are heating the pool....for now.

    The later stop time is because we usually get in the spa sometime between 6 and 6:15pm, and I thought it would be good to put the pump back in pool mode for a little while after we get out of the spa. Should I have the pump running longer after we get out of the spa?

    Thanks again.
    <12,000 gallons, IG white plaster, 1HP Pentair WhisperFlo pump for pool, 2HP Pentair WhisperFlo pump for spillover spa when in spa mode, 1½HP Pentair WhisperFlo pump for 2 Sheer Descents, Pentair Booster Pump for Polaris 280, Pentair FNS Plus DE Filter, Jandy Aquapure SWG, Pentair MasterTemp Natural Gas Pool and Spa Heater, AND a waterproof hand-held remote control. Taylor K-2006 Test Kit

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    mas985's Avatar
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    Re: Tweeking my pump run time for the fall/winter?

    That is a lot of run time for that pool. My pool is twice the size of yours, my pump is half as big and I only run two hours per day this time of year. In the summer, I ran only 4 hours per day and 2 of those were on low speed. Its up to you but I would try shortening your run time.
    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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