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Thread: Pump question

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    Pump question

    I have decided I need to replace my existing .75HP single speed Jandy pump. Historically I have run the pump 24/7. I enjoy the waterfall even when I'm not swimming and I figured running the water 24/7 keeps it circulating and improves filtration as well as keeping the water temp down during the summer. I may opt for running it dawn to midnight with the new one.

    My question is should I insist on a variable speed pump with this new one? I had a PB come by and he said he would just replace the existing pump with a 1.5HP single speed pump( Sta Rite I think ). Right now I am having trouble getting sufficient water to my waterfall without compromising the amount I send to the pool wall returns. He says the new one will fix that.

    Don't know if it impacts things but I'd like to add a SWG as well this spring. Any thoughts on best one for this size pool(35-40K)?

    Lastly, I've never had any automation in my setup. Any value in adding something like an Easy Touch in my situation with no spa?

    Thanks
    35000 gallon inground kidney shaped pool with Pebble Tec finish built 2001
    Jandy CL580 cartridge filter; Polaris robot cleaner;
    Candy 1.5 HP Pro Series pump: Pentair IC60 SWCG
    Greenwood SC; no well; use TF-100 test kit I got online

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    duraleigh's Avatar
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    Re: Pump question

    I think a 1.5VS makes good sense in your pool. A little too big to run at max speed but the VS feature gives you the flexibility to use several flow rates.

    I can't help with automation.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad Jimrahbe's Avatar
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    Re: Pump question

    K,

    Seems to me that if you follow your pool builder's advice, and get a single speed 1.5 HP pump, you will double your electrical costs.

    A variable speed, or two speed pump, would be a much better choice in my opinion.

    How do you currently chlorinate your pool? One of the things to consider is that if you go with a SWCG (which I love BTW), it can cause your pH to increase. If you run your waterfall a lot, this will also will cause our pH to increase.

    Just for reference, I run my 3 HP Intelliflo 24/7, most of the time at 1,200 RPM for less than $20 per month.

    Almost no one "needs" automation. But, it is fun to have, and has some advantages.

    Here is just one simple example: In my case, I don't run my waterfall much, but the system turns it on for 10 minutes a day, just to keep the water in the pipes chlorinated. A pretty simple task, but more of a pain to do daily if done manually. I'd have to physically go outside and turn a valve, then ramp the pump speed up to what is needed for the waterfall... wait 10 minutes and turn everything back to its original position.

    Thanks for posting,

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Caldera Spa.

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    mas985's Avatar
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    Re: Pump question

    Quote Originally Posted by krfuquamd View Post
    I enjoy the waterfall even when I'm not swimming .....

    Right now I am having trouble getting sufficient water to my waterfall without compromising the amount I send to the pool wall returns. He says the new one will fix that.
    If you run the waterfall a lot and you have a hard time supporting the waterfall AND the returns, I don't see how a VS is going to help you much. You would end up running it at near full speed all the time. When would you use the lower speeds?

    If you plan on running the waterfall only during daylight hours, then I would get the most efficient one speed you can w/timer.
    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: Pump question

    I plan to run the waterfall from dawn to midnight and circulate the water 24/7. I want to add a SWCG.

    - - - Updated - - -

    My existing .75 HP pump runs fine. I guess I could use that one solely for the waterfall and add a second pump for circulating water.
    35000 gallon inground kidney shaped pool with Pebble Tec finish built 2001
    Jandy CL580 cartridge filter; Polaris robot cleaner;
    Candy 1.5 HP Pro Series pump: Pentair IC60 SWCG
    Greenwood SC; no well; use TF-100 test kit I got online

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    mas985's Avatar
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    Re: Pump question

    There is rarely if ever a need to run 24/7 so if you wanted to, you could get a single speed pump and just run it only when running the waterfall. No need for any more run time than that.

    Pool School - Determine Pump 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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    CJadamec's Avatar
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    Re: Pump question

    Adding an automated diverter valve to shut off the pool returns when you only want the waterfall going coupled with a vs or 2 speed pump is an option but not a cheap or easy option. Getting a second pump and having one pump for the pool and one for the waterfall is another.
    I agree with mas tho a vs pump by itself isn't going to do much to change your situation.
    Chuck-
    15x30 AG, Pentair Superflo VS, 19" sand filter, TF-100 test kit
    Aqua Comfort ACT750 heat pump / 6x20 ground mount solar panel / DIY automation

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    Re: Pump question

    I am looking at the ecopump ep-6. I did the math and my pentair single speed 1.5hp cost 3.67 a day running 24/7. The ecopump would cost .75 a day. Now I didn't pull the amps off the pentair while it's running. This is based on the label. So, it will take a couple of years to recoup the cost, plus ecopump has 3 year warranty. Has anyone had any experience with ecopump?

    18x36 Rectangle, 8ft deep end, 26k gallons, vinyl liner, Intellichlor IC40 Chlorinator, 2-speed Ecopump, Hayward Tigershark QC Robotic Cleaner

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    Re: Pump question

    Sorry, didn't mean to hijack the thread.

    18x36 Rectangle, 8ft deep end, 26k gallons, vinyl liner, Intellichlor IC40 Chlorinator, 2-speed Ecopump, Hayward Tigershark QC Robotic Cleaner

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    bobodaclown's Avatar
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    Re: Pump question

    Maybe I'm missing something. The water is getting back to the pool via the waterfall, why does it matter if it's returned to the pool via the waterfall or the returns? Skimming action?
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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    Re: Pump question

    Quote Originally Posted by bobodaclown View Post
    Maybe I'm missing something. The water is getting back to the pool via the waterfall, why does it matter if it's returned to the pool via the waterfall or the returns? Skimming action?
    Well I guess I assumed I needed to have at least some water running thru those pipes to keep the water from being unsanitary. Also figured, maybe wrongly, that the returns assisted, by their placement, in getting surface debris to the skimmers.
    35000 gallon inground kidney shaped pool with Pebble Tec finish built 2001
    Jandy CL580 cartridge filter; Polaris robot cleaner;
    Candy 1.5 HP Pro Series pump: Pentair IC60 SWCG
    Greenwood SC; no well; use TF-100 test kit I got online

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    bobodaclown's Avatar
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    Re: Pump question

    You are correct, the returns assist in the flow to get surface debris to the skimmers. Does the skimmer action work with out the flow to the returns? You could adjust the flow so there's very little flow to those lines like 90/10, 90% to the falls, 10% to the returns.
    Murrieta, CA. 15K (Est) pool/spa. Hayward Tristar SP3220EE 2.70HP pump, Hayward Swimclear Cartridge filter C4025 425sqft (PA106), Pentair Mastertemp 400 heater. TF-100/Speedstir

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