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Thread: Caretaker 99 sounds like water hammer?

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    Danaaronjohnson's Avatar
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    Caretaker 99 sounds like water hammer?

    I just replaced my internal gear assembly in my caretaker 99 in floor cleaner box. Prior to replacing, it was making a fairly noticeable knock every time it cycled to a different set of heads.

    After replacing, the same problem exists. Could it be air trapped in the line somewhere underground causing the water hammer effect?

    Thanks Dan

    16000 gallon Saltwater, 2 HP Advantage pump
    Hayward AquaPure control with Chlorine Generator
    Plaster pool Surface, Pentair 4 Cartridge filter
    JazzLight by Fiberstars (metal halide bulb)
    CareTaker 99 In Floor Cleaner System, 20 stations

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    mas985's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    Water hammer is caused by a sudden change in the velocity of water so if it is happening with a change of the zone valve, than that is probably what is causing the problem. But what has changed?

    Did it ever not make that noise?

    Did you change the pump recently?

    Has the filter pressure change?

    Any change in the plumbing could be significant.
    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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    Danaaronjohnson's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    Thanks

    No change in any equipment or component other than the internal workings of the caretaker 99 gears.

    Yes it made the hammer noise prior to change.

    16000 gallon Saltwater, 2 HP Advantage pump
    Hayward AquaPure control with Chlorine Generator
    Plaster pool Surface, Pentair 4 Cartridge filter
    JazzLight by Fiberstars (metal halide bulb)
    CareTaker 99 In Floor Cleaner System, 20 stations

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    Danaaronjohnson's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    Original pump and original plumbing


    Pump psi measured at top of filter housing is 22 psi pumping at max pressure through solar panels

    16000 gallon Saltwater, 2 HP Advantage pump
    Hayward AquaPure control with Chlorine Generator
    Plaster pool Surface, Pentair 4 Cartridge filter
    JazzLight by Fiberstars (metal halide bulb)
    CareTaker 99 In Floor Cleaner System, 20 stations

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    Mod Squad Bama Rambler's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    A caretaker making that noise isn't uncommon. You could add an accumulator (small air tank) to the system and it usually helps the noise a bit. Most systems filters trap enough air and have enough 'give' that water hammer isn't usually noticed.
    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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    Danaaronjohnson's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    Ok thanks

    I thought about adding an accumulator as well as you suggest.

    Using the gauge and air bleed device on top of my filter housing I ensure no air is trapped in the filter. Maybe I should not bleed that off and see if it helps.

    Thanks

    16000 gallon Saltwater, 2 HP Advantage pump
    Hayward AquaPure control with Chlorine Generator
    Plaster pool Surface, Pentair 4 Cartridge filter
    JazzLight by Fiberstars (metal halide bulb)
    CareTaker 99 In Floor Cleaner System, 20 stations

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    Re: Caretaker 99 sounds like water hammer?

    I had this same noise coming from my Caretaker - it's quite disconcerting isn't it?

    I adjusted the Jandy valve going to the caretaker to be open just a tiny bit, not enough to have the Caretaker running, and left it like that for about an hour or so. I then turned it back to fully open and the noise was gone and has been working fine ever since.
    16K gal IG Pebble-tec, Pentair Intelliflo VS pump (2015), Triton II TR-100 30" sand filter (ancient?), TF-100 test kit, Aquabot Turbo T-jet, Hayward Aquarite 25k SWG

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    Danaaronjohnson's Avatar
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    Re: Caretaker 99 sounds like water hammer?

    Thank you

    I'll give that a try!

    16000 gallon Saltwater, 2 HP Advantage pump
    Hayward AquaPure control with Chlorine Generator
    Plaster pool Surface, Pentair 4 Cartridge filter
    JazzLight by Fiberstars (metal halide bulb)
    CareTaker 99 In Floor Cleaner System, 20 stations

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