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Thread: Peristaltic Pump Question

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    Peristaltic Pump Question

    I've spent the last couple of days researching the various pumps and systems and what I don't understand is why they all seem to have such high flow rates, even the ones specifically for residential applications.

    Am I right that to add 1 ppm of FC to a 30,000 gallon pool one needs less than half a gallon of 12% Sodium hypochlorite? If that is true then even assuming one was running without any CYA why would one need, or want, a pump that is capable of 8-15 gpd (which seems to be the smallest size Stenner makes)?

    I must be missing something.
    33'x15' x 52" Aqualeader
    Gallons ? - (I use appx 13,500 to calculate "stuff")
    33 x 15 x 4.3 x 5.9 = 12,558. or . . The Pool Calculator = 14,400
    Hayward S-166T 100Lb Sand Filter - Hayward Power-Flo LX 1HP Pump
    Intex S.W.G.

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    Join Date
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    Re: Peristaltic Pump Question

    Most that use one either use a controller with sensors or a timer.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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    Mod Squad Bama Rambler's Avatar
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    Re: Peristaltic Pump Question

    As Scott said most people run them on timers or through an automation system. Stenner makes a 3gpd pump, even that's too big if you were to run it 24 hours a day. Most people don't run their filter pump 24 hours a day so the higher volume peristaltic pump is required to inject enough chlorine/acid during the filter run time.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Peristaltic Pump Question

    So does my calculation sound about right then? I could see running through a gallon of 12.5% on a hot,sunny day (no CYA) especially with a heavy bather load, but does that sound like about the max for one 24 hour period?
    33'x15' x 52" Aqualeader
    Gallons ? - (I use appx 13,500 to calculate "stuff")
    33 x 15 x 4.3 x 5.9 = 12,558. or . . The Pool Calculator = 14,400
    Hayward S-166T 100Lb Sand Filter - Hayward Power-Flo LX 1HP Pump
    Intex S.W.G.

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    Mod Squad Bama Rambler's Avatar
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    Re: Peristaltic Pump Question

    Without some actual history it's hard to say but I'd guess you wouldn't use over that amount.

    According to pool calc it takes ~32oz (1 qt) of 12.5% bleach to raise the FC 1ppm in a 30k gal pool. So if you lost 4ppm per day, which is certainly possible, it'd take 1 gal/day to maintain the FC level.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Peristaltic Pump Question

    I was running the same calculation so good to know I didn't slip a decimal point or something.

    The pump is an Intelliflo and currently its running 24/7 at the minimum rate (15gpm) which results in about 1 turn/day. I've got an electric pool cover which is closed except when we are actually swimming because we don't have a fence so the FC consumption even without CYA is currently extremely low but.

    Looks like I'll have to start searching for a pump on ebay and play around. A dosing pump seems the way to go. Thanks for the help.
    33'x15' x 52" Aqualeader
    Gallons ? - (I use appx 13,500 to calculate "stuff")
    33 x 15 x 4.3 x 5.9 = 12,558. or . . The Pool Calculator = 14,400
    Hayward S-166T 100Lb Sand Filter - Hayward Power-Flo LX 1HP Pump
    Intex S.W.G.

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    Richard320's Avatar
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    Re: Peristaltic Pump Question

    Ages ago I worked at a Boy Scout camp with a pool. We had one of those pumps. The outlet was wired into the pump timer. If the filter was on, so was the pump. If it got too high, unplug it for a few hours. That seldom happened; 200 dusty boys/day and a lot of splashout pretty much ensured the FC never got too high.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Peristaltic Pump Question

    Can't do that with the Intelliflo because it has all the timers internal.

    However I found a little box with a ring on the side that I can use to solve the problem. You run the power line for the pump through the ring and the box gives you a signal for when the power is flowing. Use that to control a relay that powers the doser pump. Not very elegant, but it appears to be the easiest way unless Pentair tells me there is an output that tells me the pump status.
    33'x15' x 52" Aqualeader
    Gallons ? - (I use appx 13,500 to calculate "stuff")
    33 x 15 x 4.3 x 5.9 = 12,558. or . . The Pool Calculator = 14,400
    Hayward S-166T 100Lb Sand Filter - Hayward Power-Flo LX 1HP Pump
    Intex S.W.G.

  9. Back To Top    #9

    Join Date
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    Re: Peristaltic Pump Question

    If the peristaltic pump has a regular 3 prong plug, a cheap AGP pump timer will give you your timed control.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  10. Back To Top    #10

    Join Date
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    Re: Peristaltic Pump Question

    Quote Originally Posted by sbe
    Can't do that with the Intelliflo because it has all the timers internal.

    However I found a little box with a ring on the side that I can use to solve the problem. You run the power line for the pump through the ring and the box gives you a signal for when the power is flowing. Use that to control a relay that powers the doser pump. Not very elegant, but it appears to be the easiest way unless Pentair tells me there is an output that tells me the pump status.

    Make sure you don't put both conductors through the ring, you will be disappointed in the results. You can only put one leg through to measure current flow.

    I use a couple of these to turn on my in house HEPA filters when the air handler fan turns on.

    dave
    15,500 gal, inground gunite pool with 7 ft spa, 2 speed pump 2hp/.33hp, 3/4 hp booster pump, Intermatic P1353 timer, AutoPilot SC-48, Sand filter with ZeoBest, Heater, that I never use . . .

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