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Thread: Cartridge filter observations

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    Cartridge filter observations

    I opened our cartridge filter for the first time since the install and start up 3 months ago. Does the one on the left look normal, too dirty or could I have gone longer. I run the aquabot cleaner once to twice a week depending on weather and pool use. But I am happy to say we have had a nice clean pool all summer long.


    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Re: Cartridge filter observations

    Just depends on what amount of dirt and debris you get. But for 3 months, looks pretty normal.
    Jacob Zaluski, Owner
    True Blue Pools LLC. Lexington, KY
    Service Center for Hayward Pool Products

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    You should only need to clean the filter when the pressure rises 20-25% over the clean pressure. That could be 3 months, or 12 months, or 1 week depending on your pool cleanliness and chemistry.
    Jason, TFP Moderator
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    Re: Cartridge filter observations

    With an oversized cartridge filter, is it a certainty that pressure will rise that much as a guaranteed indicator of when it is time to change/clean filter? I am asking because I have never seen a pressure rise on the gauge at the filter in my 13 months with a new pool, but I thought that I saw evidence of poor filtration after a ton of pollen and seed husks from overhanging trees clogged up my filters. So I changed/cleaned anyway. Is it possible that you won't get a measurable rise on the filter pressure gauge? I am asking because I just don't know when I should be alert to the need to change/clean the cartridges.
    19' x 37' Freeform IG; 25,500 gallons; max depth 8'6" with diving board; sun bench and swim out shelf. PebbleSheen Blue Granite Finish; Noble Tile--NVSA616 Peacock; Sandstone Retaining Wall; Oklahoma Flagstone Coping, Aggregate Deck; Small Water Feature w/ Moss Rock (70% flats and 30% boulders) Jandy Stealth 2HP Pump and CV460 Filter; AquaCal SQ156 Heat Pump/Chiller; Polaris 380 pressure cleaner w/ Halcyon boost pump.

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    Dirt can not bypass the filter unless you have a problem. As the filter gets dirty, the flow rate should be reduced and the pressure must go up.

    That said, if you have low debris load and an over-sized filter, it is certainly possible to go over a year without a large pressure rise. I would suggest a yearly cleaning even if the pressure has not gone up.
    Jason, TFP Moderator
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    Re: Cartridge filter observations

    My pressure gauge doesn't move at all unless I close off all the returns except for the deck jets.


    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    On low speed you may not be able to discern a difference in pressure. So make sure you do the pressure checks on high speed with the same valve settings.

    If the pressure is not going up, the flow must not really be reduced and there is no reason to clean it yet, unless you want to ... or if has been a year
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Cartridge filter observations

    It seems so easy to clean I will probably stick with every couple of months unless I notice a pressure change. I think a majority this time was from the install and construction around the pool.


    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    svenpup's Avatar
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    Re: Cartridge filter observations

    My pressure never goes up very much. I clean them once a year whether they need it or not (which they don't)
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    Re: Cartridge filter observations

    I finally took the time to see why my 2 speed pump was only running 1 speed no matter what I set. I am amazed it was working at all the way it was wired but I got it corrected once Hayward sent the correct schematic. I now get a pressure reading around 9 in high speed with all the valves open.
    I have been running on low speed for 9 hours a day broken up into 4 2:15 run times with 45% swg. Any ideas how it should be broken up now? The controller allows 2 high speed time intervals and 2 low speed intervals.
    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    Determine Pump Run Time

    Trial and error to keep your pool looking clean enough for you. Likely can get buy with less run time, especially as the weather cools.
    Jason, TFP Moderator
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    Re: Cartridge filter observations

    How does high versus low speed affect swg percentage?
    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    As long as low speed is enough flow to keep the SWG generating, then the motor speed has no impact on the amount of FC output.

    The % is just the % of time in a given cycle (1 to 2 hours for many SWGs) that it is generating vs not generating.

    My SWG runs fine on low ... until the filter gets too dirty and the flow rate drops.
    Jason, TFP Moderator
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    Re: Cartridge filter observations

    Mine apparently has worked fine on low for a while now, I didn't know that since the high speed would push more water through during a given time interval if it would then produce more FC or not
    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge filter observations

    Nope. Output FC level is the same regardless of flow rate ... assuming the minimum flow rate is met.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Cartridge filter observations

    Great, thanks
    18x36 Vinyl, sports depth, 8' Roman steps at each end. Hayward 1.5hp 2speed pump, catridge filter, 2 skimmers, no main drain, 3 SR Smith Treo LED lights

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    Re: Cartridge filter observations

    I clean my filter every 4 weeks regardless of condition. That's just a habit I got into because of my preventative maint nature at work. It's easier for me to it that way than to wait for trouble.
    Regarding pressure readings, because I run my VS at 1200 RPM the gauge never registers at all. If I run my pump at considerable higher RPM's then I see pressure. My system is quite happy a 1200 RPM.
    This is first year with a pool, we have had zero issues as far a keep up with the FC demand or any thing else. Crystal clear water all summer thanks to the good people on this forum.
    12 x 26 Viking FG IG, Bermuda Model, 3 1/2' to 5', 7000 Gallons, Diamond Series Maya, Hayward 1 1/2 HP Maxflo VS, Hayward Stay Clear Plus Cart Filter C17502(S), Hayward Aqua Rite SWG w/T3 cell, Color Changing FIBERSTAR Lighting, Aqua Bot Supreme Robotic cleaner, Brushed Concrete with CCI Liberty Tan color, Taylor K-2006 test kit, Armor Foundation penetrating concrete sealer(lifetime warranty).

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