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Thread: Yet another request for advice on pump replacement :)

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    Yet another request for advice on pump replacement :)

    Hi all, My pump is dying and seriously oversized, so I am researching a replacement. The filter is Pentiar and current pump is Emerson 3hp. Our pool is an 18 x 36 Grecian with vinyl liner, about 24,000 gallons. No water features, Minimax propane heater. Of course, the pool store is pushing for a variable speed, but I'm thinking I would be dead before it paid for itself. So, a 2-speed is also an option. Here in Virginia, our electric rate is 11.4 cents/kWh. What specific pump would you guys suggest?? Thanks in advance for your words of wisdom!
    18x36 inground Grecian vinyl approximately 24,000 gallons. Pentair sand filter and 3 hp Emerson pump (here when we bought the house 8 years ago). Poolvergneugen 4x, TF 100.

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    cowboycasey's Avatar
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    Re: Yet another request for advice on pump replacement :)

    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Re: Yet another request for advice on pump replacement :)

    That sounds like I a great price! Especially, when the variable speeds are around $1000.
    18x36 inground Grecian vinyl approximately 24,000 gallons. Pentair sand filter and 3 hp Emerson pump (here when we bought the house 8 years ago). Poolvergneugen 4x, TF 100.

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    cowboycasey's Avatar
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    Re: Yet another request for advice on pump replacement :)

    just make sure it will move enough water to keep your heater happy.. it may have to run on high but at 8 amps it will not cost anything compared to that 3hp it would be a bonus if it could run on low and the heater still worked...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Agent99's Avatar
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    Re: Yet another request for advice on pump replacement :)

    What size are the plumbing lines for your pool? You want to be careful and not get too low a power of a pump. No solar panels, right? Just checking.
    ----Chris----
    25k IG/Spa Figure 8, 18x36, Pebble Sheen Blue Granite, Sta-Rite S8M150 Cartridge Filter, Pentair 460805 400k BTU Heater & 011018 IntelliFlo VarSpd
    Liquidator, Fafco Solar Heat, Polaris PB460 Booster Pump w/280 cleaner, Katchaleaf Cover, TF100 Test Kit, FAKE MAIN DRAIN

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    Re: Yet another request for advice on pump replacement :)

    Our plumbing lines are 2" and no solar. With such a large outlay of cash, I really want to be sure we get the right pump!
    18x36 inground Grecian vinyl approximately 24,000 gallons. Pentair sand filter and 3 hp Emerson pump (here when we bought the house 8 years ago). Poolvergneugen 4x, TF 100.

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    Agent99's Avatar
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    Re: Yet another request for advice on pump replacement :)

    Well, my pool is about the same size as yours. I also have solar panels on top of the second story of my house. My suction lines are 2". My return lines are 1.5".

    I have a VS IntelliFlo pump from Pentair. I can run that sucker at a very low rpm (like the equivalent of a 3/4 HP pump I'm told by a Pentair tech) and STILL pump up to my solar panels and back. Since you have the bare minimum in pool equipment, I think the pump size that cowboycasey posted would work just fine and think that you could likely run it at the low-speed and still be fine. As as was said, just bump it up to the high speed when you run the heater. Keep it on low speed for general filtering and flow. Run the low-speed for a longer period of time than your old one and you'll still be miles ahead in energy savings.
    ----Chris----
    25k IG/Spa Figure 8, 18x36, Pebble Sheen Blue Granite, Sta-Rite S8M150 Cartridge Filter, Pentair 460805 400k BTU Heater & 011018 IntelliFlo VarSpd
    Liquidator, Fafco Solar Heat, Polaris PB460 Booster Pump w/280 cleaner, Katchaleaf Cover, TF100 Test Kit, FAKE MAIN DRAIN

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    Re: Yet another request for advice on pump replacement :)

    Great! Thanks so much for the feedback. With a purchase like this, I just want to be sure we are making the right decision.
    18x36 inground Grecian vinyl approximately 24,000 gallons. Pentair sand filter and 3 hp Emerson pump (here when we bought the house 8 years ago). Poolvergneugen 4x, TF 100.

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    Mod Squad pooldv's Avatar
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    Re: Yet another request for advice on pump replacement :)

    Pentair also makes a 1-1/2hp VS pump, 342001 for 650 bucks.

    Pentair SuperFlo VS Pump 342001 | Pentair 342001
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: Yet another request for advice on pump replacement :)

    Sorry to hijack the thread and I am sure there are plenty of other 2-speed versus variable speed discussions out there. Just a quick question for you all.

    I too am shopping for new pump and motor and read in a hayward user manual for a two-speed that priming must be done at high speed. How can I do this if I run a timer? Do I have to run it on high for 30 seconds before going to low every day? How would one do that? Thanks!

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    EVChargeGuy's Avatar
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    Re: Yet another request for advice on pump replacement :)

    Quote Originally Posted by pooldv View Post
    Pentair also makes a 1-1/2hp VS pump, 342001 for 650 bucks.

    Pentair SuperFlo VS Pump 342001 | Pentair 342001
    Just a FYI, Hayward also makes a VS Pump in the $650 price range
    Hayward Super Pump Variable Speed Pump SP2602VSP - PoolSupply4Less
    IG Tear Drop, Dark Gray Gunite , 27,000 gallons -Age 50+-years, very old Hayward Split Egg Sand Filter with side mount Multi-port- Hayward SP2600VSP Pump- Hayward chlorine feed (not used since finding TFP) - Laars 315K BTU Oil heater- LoopLoc Safety cover- AquaBot RAPIDS 4WD- TF-100 Test Kit w/ Speedstir- 390 Gal Hot Springs Spa Envoy installed May 2017

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    Agent99's Avatar
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    Re: Yet another request for advice on pump replacement :)

    Quote Originally Posted by GigaMike View Post
    Sorry to hijack the thread and I am sure there are plenty of other 2-speed versus variable speed discussions out there. Just a quick question for you all.

    I too am shopping for new pump and motor and read in a hayward user manual for a two-speed that priming must be done at high speed. How can I do this if I run a timer? Do I have to run it on high for 30 seconds before going to low every day? How would one do that? Thanks!
    I can only tell you the my VS IntelliFlo does that but it senses the flow rate and if it doesn't prime in the first 3 seconds (at 1800 rpm), it'll ramp to max speed and attempt to prime for about 20 seconds. Assuming it primes at the max speed, the pump will then drop back to whatever it was programmed to run at. If it doesn't prime, it repeats the priming process: 3 s at 1800 then 20 s at max. It'll do this for 11 minutes before stopping and then it shows a priming alarm. I don't know what intelligence/communication, if any, is built into the Hayward pump you are referring to. I also don't know what kind of access you have to the two speeds for the motor. If they simply bring out 3 wires (high, low, common), then conceivably you could hook up two timers or run it through some kind of a contactor switching system or buy a control panel assuming the pump has some kind of a communication port (2-wire, RS-485, for example).
    ----Chris----
    25k IG/Spa Figure 8, 18x36, Pebble Sheen Blue Granite, Sta-Rite S8M150 Cartridge Filter, Pentair 460805 400k BTU Heater & 011018 IntelliFlo VarSpd
    Liquidator, Fafco Solar Heat, Polaris PB460 Booster Pump w/280 cleaner, Katchaleaf Cover, TF100 Test Kit, FAKE MAIN DRAIN

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    Re: Yet another request for advice on pump replacement :)

    Quote Originally Posted by pooldv View Post
    Pentair also makes a 1-1/2hp VS pump, 342001 for 650 bucks.

    Pentair SuperFlo VS Pump 342001 | Pentair 342001
    OOOhhhh, this looks very interesting!! Thanks so much, all!
    18x36 inground Grecian vinyl approximately 24,000 gallons. Pentair sand filter and 3 hp Emerson pump (here when we bought the house 8 years ago). Poolvergneugen 4x, TF 100.

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    Re: Yet another request for advice on pump replacement :)

    If the system isnt opened to allow air in (pump lid opened to remove debris, filter taken apart, etc) and you have no air leaks in the system, keeping the pump on a timer to start in low speed isnt a concern. The pump holds it's prime overnight. If you notice that, after being off for several hours, the pump is no longer full of water, you have air leaks somewhere in the system that need to be addressed.

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