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Thread: Filter gauge - what should it read when off?

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    steveb21's Avatar
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    Filter gauge - what should it read when off?

    Clearing out a messy pool, when i switched pump and filter on to 'filter' mode, the reading shot up from

    0.3 bar off
    1 bar on

    4 psi off
    15 psi on
    Outdoor Inground Heated Concrete Tiled Pool - 25ft x 12ft and 3ft 4" to 6ft 6" deep - 45k Litre Water Capacity
    Valve - Hayward Vari-flo 711-13 ------ Pump - Sta-Rite 5P1R
    Filter - Hayward S244T -------- Test Kit - Taylor K2006C

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    Patrick_B's Avatar
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    Re: Filter gauge - what should it read when off?

    When your pump is off, it should read Zero. If not, replace it with a new high quality liquid filled gauge.
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    steveb21's Avatar
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    Re: Filter gauge - what should it read when off?

    Right, looks like its faulty then.

    Ive taken it off.... still showing 0.3. Will get a replacement.

    On another note, what should my reading go up to once i start the filtration? As mentioned its a dirty green pool at the moment.
    Outdoor Inground Heated Concrete Tiled Pool - 25ft x 12ft and 3ft 4" to 6ft 6" deep - 45k Litre Water Capacity
    Valve - Hayward Vari-flo 711-13 ------ Pump - Sta-Rite 5P1R
    Filter - Hayward S244T -------- Test Kit - Taylor K2006C

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    Re: Filter gauge - what should it read when off?

    what should my reading go up to once i start the filtration?
    Depends entirely on how much "junk" is captured by your filter. The psi may be somewhere between 8-16 when the filter is clean but steadily increasing as the filter gets dirtier. Backwash when that pressure rises by 25% over the clean pressure.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    steveb21's Avatar
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    Re: Filter gauge - what should it read when off?

    OK, if my gauge is reading 4psi when off and then 15 psi on ... so a ON PSI of 11, that seems OK yes?

    If it increases to an extra 4psi ... i should backwash filter?

    Just thinking of starting the filter with the current gauge and adding on the difference.
    Outdoor Inground Heated Concrete Tiled Pool - 25ft x 12ft and 3ft 4" to 6ft 6" deep - 45k Litre Water Capacity
    Valve - Hayward Vari-flo 711-13 ------ Pump - Sta-Rite 5P1R
    Filter - Hayward S244T -------- Test Kit - Taylor K2006C

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    Re: Filter gauge - what should it read when off?

    That "could" be the case, or the gauge is completely whack. You will want to replace as quick as possible. Maybe even consider not starting the slam until it is replaced.
    310 gallon Tiger River Sumatran Spa, covered, standalone, fiberglass, Bleach
    11,000 gallon in-ground plaster pool, Hayward SmartFilter 550 (cartridge), CompuPool(Hayward) T-15 SWG, Hayward Super II pump
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    mas985's Avatar
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    Re: Filter gauge - what should it read when off?

    Quote Originally Posted by steveb21 View Post
    Clearing out a messy pool, when i switched pump and filter on to 'filter' mode, the reading shot up from

    0.3 bar off
    1 bar on

    4 psi off
    15 psi on
    Is the equipment installed in the basement below the pool? If so, 4 PSI when off may not be that far off of reality. That would be about 9' below water level which is the equivalent of one story below water level.
    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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    steveb21's Avatar
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    Re: Filter gauge - what should it read when off?

    Quote Originally Posted by Analogbytes View Post
    That "could" be the case, or the gauge is completely whack. You will want to replace as quick as possible. Maybe even consider not starting the slam until it is replaced.
    I most defo will not be starting the slam untill the gauge is replaced. Was thinking to start the system with it just to make sure everything is working as it should. Once i have filtered it for 30 mins, i will redo my taylor k2006 test for more up to date/accurate readings.

    Sound like a good idea?
    Outdoor Inground Heated Concrete Tiled Pool - 25ft x 12ft and 3ft 4" to 6ft 6" deep - 45k Litre Water Capacity
    Valve - Hayward Vari-flo 711-13 ------ Pump - Sta-Rite 5P1R
    Filter - Hayward S244T -------- Test Kit - Taylor K2006C

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    mas985's Avatar
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    Re: Filter gauge - what should it read when off?

    Quote Originally Posted by mas985 View Post
    Is the equipment installed in the basement below the pool? If so, 4 PSI when off may not be that far off of reality. That would be about 9' below water level which is the equivalent of one story below water level.
    In case you missed this question because we posted at the same time.
    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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    steveb21's Avatar
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    Re: Filter gauge - what should it read when off?

    Sorry bud, I did miss it.

    Equipment is at the same height level as the pool. No removed the gauge and the reading stayed the same, 0.3. I will order another one tomorrow.

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