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Thread: Replacing Infinity Edge Pump

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    Replacing Infinity Edge Pump

    Pool Details: In Ground PebbleTec 30000 gallons. Infinity edge is 40'. A 4.5 HP pump currently runs the infinity edge. This pump has 4" pipe coming in and going out of the pump. I want to replace this with a variable speed pump for obvious reasons (energy HOG!). Can I reduce the 4" piping that comes in and out of the pump to 2" on the input and then open it back up to 4" on the outflow side of the pump? The whole run is currently 4" piping. I only see VS pumps that have 2" in and out ports. Your help is greatly appreciated.

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    Oh I should mention I want to do a 2 or 3HP VS pump for the replacement. Water currently flys over the edge and I think I can get away with less flow. The edge is very level.

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    bobodaclown's Avatar
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    Re: Replacing Infinity Edge Pump

    Do you have any specifics on the pump? Make/manufacturer? The infinity edge probably needs a certain flow to look right, you may be able to swap out just the motor portion and keep the wet side. Can you post a picture of the pump?
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Re: Replacing Infinity Edge Pump

    The pump is a Speck Pump Model 21-80 BS. I would like something that is less of an energy hog and maybe multiple speeds so I can have a trickle flow over the edge instead of Niagra Falls. Is it okay to reduce the pipe size at the pump and then bring it back up after the pump on the return side?

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    JasonLion's Avatar
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    Re: Replacing Infinity Edge Pump

    That could have a 4 or 6 HP motor, typically with three phase power. There should be a specifications plate on the motor that gives the exact specifications.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Replacing Infinity Edge Pump

    P8200780.jpgAttached is a photo of the plate on the current pump that I hope to replace. It is 4 HP.spilloverpump.jpgspilloverpump.jpg
    Last edited by overtheinfinityedge; 07-20-2014 at 06:48 AM. Reason: Adding another photo

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    JasonLion's Avatar
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    Re: Replacing Infinity Edge Pump

    The largest of the residential variable speed pumps is the IntelliFlo XF, which will only move about 2/3rds as much water at full speed. It does have connections for 3" plumbing. If you go this route, you will need to rewire the power for the pump. Your current pump is presumably 3 phase, and the IntelliFlo XF is single phase 230 volts.

    There are a number of commercial variable speeds in the correct size range, but unfortunately I am less familiar with them.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    mas985's Avatar
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    Re: Replacing Infinity Edge Pump

    If the flow rate is not sufficient on an infinity edge, debris may get stuck at the edge instead of going over. The XF might be your best choice but keep in mind that it may not produce enough flow rate to make the edge work well.

    According to this site: http://www.aqthemagazine.com/how-to/...edge-pool.html

    You want 5 GPM per foot of edge (~1/8" weir) and the XF may not be able to do that unless the plumbing head loss is pretty low but even then the pump would be close to run out which isn't good either.

    Do you have a head curve for the existing pump?
    Mark
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    JasonLion's Avatar
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    Re: Replacing Infinity Edge Pump

    I believe he has the smallest of the four variants of this pump. There is a link there for the curves.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    mas985's Avatar
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    Re: Replacing Infinity Edge Pump

    That is a fairly low head and high flow rate pump compared to the XF which is a high head pump. So I guess it depends on where the operating point is right now. If it is 200 GPM @ 53' of head, then the XF would be at about 185 GPM @ 45' of head. Not too bad but I am guessing at the current operating point.
    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: Replacing Infinity Edge Pump

    I would suggest the IntellifloXF or the AF-180 Waterfall pump by Pentair.

    The Waterfall pump is designed for low head high flow applications and will give good performance at low energy use.

    What is the level of the trough in relation to the pump?

    Note: The current motor looks like it is a B116, which has the following specs:

    H.P = 4
    Volts = 208 - 230
    S.F = 1.25
    Phase = 1
    Amps: 21.0-19.4

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    Re: Replacing Infinity Edge Pump

    I'm not sure if this helps in determining size of pump needed, but I have a 1.5HP pump that filters the main pool and I am able to turn a valve which changes the filtration to pull from the main drains in the pool to the drains in the catch basin. When I do this it creates a nice flow over the infinity edge with that small pump. I am thinking of adding an actuator that would allow automatic filtration from the catch basin for a couple of hours a day and then switch to the main pool for the rest of the day. Would that work?

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    Re: Replacing Infinity Edge Pump

    Here is a picture of the edge. Stone on Pool.jpg. This is with a panoramic so it looks rounder than it really is.

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    Re: Replacing Infinity Edge Pump

    If you're happy with the flow, you can just use your main pump. You don't need an extra pump.

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    Re: Replacing Infinity Edge Pump

    Is there an easy method to control an actuator via timer to change the suction on a 3-way valve? This would allow me to filter from the catch basin for a couple of hours and then the main pool for the rest of the time? I don't want to spend the money on these overpriced automation systems that are based on some old computer technology (like Atari).

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    I'd still like to replace the edge pump for special occations use only with something smaller so that I can engage that water feature when I want to rather than the current method of having to engage it to get skimming on the pool. My question on reducing the piping at the pump from 4" to 3" still stands - is that okay to do - reduce to 3" before the pump and then after the pump go back up to 4"?

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    mas985's Avatar
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    Re: Replacing Infinity Edge Pump

    Intermatic has some:
    http://www.intermatic.com/en/Product...ies/PE140.aspx

    And yes, you can neck down to the pump pipe size.
    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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