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Thread: New Compupool CPSC36 now I have a question

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    New Compupool CPSC36 now I have a question

    I just installed a CPSC36 on my 21X41 oval AGP. I have a 2 speed pump and when I run it on low the water level in the cell drops down. Is this bad for the cell? Does this mean I need to run the pump on high when the SWG is running? I hope not.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    JasonLion's Avatar
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    Re: New Compupool CPSC36 now I have a question

    How far down does the water level in the cell go? If it is only a short distance, say 1/4" then it is totally fine.

    The cell won't be damaged by running it that way, even with a lot of air in the housing, but it won't produce as much chlorine and may get error messages.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: New Compupool CPSC36 now I have a question

    I left it on low overnight and the water level dropped to rhe bottom. So now it's back to the drawing board to look at all my options.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    bobodaclown's Avatar
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    Re: New Compupool CPSC36 now I have a question

    What if you partially block one of the returns? This post comes when I'm thinking of switching to a 2-speed motor. Currently my flow rate is approx 48-50 gpm. I'm hoping that at the low speed I'll get 24 gpm and that will be enough for the SWCG.

    If you don't mind keep this post updated.

    Bob
    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: New Compupool CPSC36 now I have a question

    Playing with the valves i can slow down the water drop a little, but not enough. Guess I will look at a single speed pump and a timer. Unless I can find a possible leak on tge skimmer line or find a air release valve. I think if I am sucking in air at low speed it is rising to the cell.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Re: New Compupool CPSC36 now I have a question

    Okay I think I found some of the problem. Since the generator is clear I am able to see air bubbles. Air bubbles only enter the unit when the pump is on low speed. I have noticed since last year when I bought the pump (used) that when switching to low from high speed the lid does jump up a tiny bit, like the suction is not strong enough to keep the lid on tight. I have replaced the O ring, lubed it good, even clamped it and wrapped leak seal tape around the edge of the lid, but always had air accumulate in the filter basket when the pump was on low. Now I believe the air is finding it's way to the cell unit. Does anyone think a new lid might fix this issue?
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Mod Squad Bama Rambler's Avatar
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    Re: New Compupool CPSC36 now I have a question

    Is the pump above the water level?
    Are there bubbles in the pump basket when the pump's on high?
    A new lid might help but I suggest more lube first.
    Have you tried running water over the fittings and valves to see if the bubbles go away?
    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
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    Re: New Compupool CPSC36 now I have a question

    The pump is below the water level, but not too much. When the pump is on high there are not any bubbles in the basket. I tried to find the suction leak last year and was not able to find anything. Now when the pump is on low the bubbles seem to find their way to the cell, and I don't have that much air in the basket.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Mod Squad Bama Rambler's Avatar
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    Re: New Compupool CPSC36 now I have a question

    Have you removed and resealed the pump drain plugs?
    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: New Compupool CPSC36 now I have a question

    Quote Originally Posted by Bama Rambler
    Have you removed and resealed the pump drain plugs?
    Yes last July.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Mod Squad Bama Rambler's Avatar
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    Re: New Compupool CPSC36 now I have a question

    There was a report a while back on here about a pump strainer basket lid that had a very small crack. It was very hard to see but it opened up under vacuum enough to allow in air. You could have a similar issue. I'd inspect the lid very closely.
    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: New Compupool CPSC36 now I have a question

    One more thought, should I have mounted the cell lower than the top of my filter. I have it about 6"-8" above the outlet. Is this too high, creating too much of a head?
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    Mod Squad Bama Rambler's Avatar
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    Re: New Compupool CPSC36 now I have a question

    Mounting it above the filter isn't a problem at all.
    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: New Compupool CPSC36 now I have a question

    Update. I clamped the pump lid down and that stopped the air from flowing in on low speed. I let the pump run on low for a few hours and the water only dropped a tiny bit in the cell. I put the unit on superchlor and the level dropped halfway in less than 10 minutes. Guess I'll call compupool tomorrow and see what they think.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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    JasonLion's Avatar
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    Re: New Compupool CPSC36 now I have a question

    Gas is produced in the cell when it is active. Obviously, it needs some minimum flow rate to clear that gas out of the cell. I'm just surprised that the minimum flow rate isn't lower. I suppose part of the issue is that few SWGs have clear cells, so we don't really know what is going on inside most other SWG cells.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: New Compupool CPSC36 now I have a question

    So Compupool told me the unit is too high and they suggest 18" above the ground, so I think it's worth a try. Hopefully the weather is nice enough so I can play with some PVC tomorrow.
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

  17. Back To Top    #17

    Re: New Compupool CPSC36 now I have a question

    Lowering it did the trick!!
    21' x 41' Oval AGP for all 9 kids and wife 1 Skimmer, 2 returns, 22" sand filter, Pentair Dynapro 1.5 HP 2 speed pump. Compupool CPSC 36 SWCG.

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