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Thread: Saltwater system gaining air when the system starts up

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    Saltwater system gaining air when the system starts up

    We have a index filter pump 635T and it's connected to a saltwater system generator... We have had no issues with it since we bought it 3 weeks ago and since last week have had code 90 low flow we have cleaned everything and did what the book says???? We did notice that the electrolytic cell looses water when the system actually starts generating and within minutes it will throw a code 90? We have tilted and everything to remove air but it still does it when it starts to generate??????
    - Pool Type: 15k Gal Gunite IG / Chlorine Treated / Built 1988 / Pump runs ~12 hrs/day
    - D.E. Filter: OEM: Nautilus (Pentair) #NS 36 / 36 Sq Ft / D.E. Charge: 3.6 Lb / Normal "Clean" pressure: 12-14 PSI
    - Polaris Model 380 (Booster Pump) runs ~3 hrs/day // Pool Water Testing Info: Leslie's Kit OEM: Taylor, exact kit # unknown. Reagent kit, tests for FC,TC,CC,pH, AL,CYA,CH
    - Pool Testing Frequency: every 4 days for FC,pH Biweekly for AL Occasional for CH, CYA // Pool Chlorine Treatment Info: occasional "Shock" product: Calcium Hypochlorite Granules 68% / Maintaining 6-7 Trichloro Tablets in Chlorinator

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    linen's Avatar
    Join Date
    Jul 2010
    Twin Cities, MN

    Re: Saltwater system gaining air when the system starts up

    Welcome to tfp,Browns02

    That pump/filter combo will likely have to be cleaned often to move enough water so that the swg is happy with the flow rate.

    The air you are seeing in the swg is likely from the swg reaction going on, and since you have low flow, the gas is not being expelled into the pool.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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