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Thread: Difference between "backwash" and "rinse"

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    Difference between "backwash" and "rinse"

    Guys,

    I'm quite curious as to what the difference is in flow through the sand filter on backwash vs rinse. They both send water through the drain and not back into the body of water, right? So really what does the "rinse" cycle even do?
    69,000 Gal gunite indoor IG pool.
    5 HP Emerson - Pentair Triton II Commercial TR140c Sand Filter x2
    5,000 Gal gunite outdoor IG hot tub
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    Mod Squad JohnT's Avatar
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    Re: Difference between "backwash" and "rinse"

    Rinse runs water in the same direction that normal filtering does. Backwash runs it through the sand in the opposite direction. Rinse is to clear any dirt out of the clean side of the sand before you start sending it back to the pool.
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    Re: Difference between "backwash" and "rinse"

    Excellent, thank you. I've tried to come up with theories based on the PSI. Guess I was over thinking something so simple
    69,000 Gal gunite indoor IG pool.
    5 HP Emerson - Pentair Triton II Commercial TR140c Sand Filter x2
    5,000 Gal gunite outdoor IG hot tub
    2 HP Sta-Rite - Pentair Triton II Commercial TR140c Sand Filter

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    Re: Difference between "backwash" and "rinse"

    JohnT you are 50% correct. Rinse just runs through the filter head. It does nothing other than passes water through the head to waste.
    Over 30 years in the pool business
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    Mod Squad Bama Rambler's Avatar
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    Re: Difference between "backwash" and "rinse"

    swimcmp -- You sure about that?

    Here's what the manual for my filter says about the rinse function.
    RINSE: From pump, through valve, downward through filter sand, up through center pipe to valve and out waste port. This position is used for start up cleaning and resettling filter bed after backwashing.
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    Mod Squad JohnT's Avatar
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    Re: Difference between "backwash" and "rinse"

    Quote Originally Posted by swimcmp
    JohnT you are 50% correct. Rinse just runs through the filter head. It does nothing other than passes water through the head to waste.
    No, it is exactly the same as filter except the outlet goes to the waste line instead of back to the pool. The water passes through the sand in the normal direction.
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    Drag.az's Avatar
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    Re: Difference between "backwash" and "rinse"

    I always wondered about that too. My manual did not give that info. Now we know. Thx yall
    13k - Martinique 15x30 52"
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    linen's Avatar
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    Re: Difference between "backwash" and "rinse"

    I have confirmed that my sand filters "rinse" position works exactly like JohnT and Bama described. What swimcmp describes is the "waste" position on my filter.
    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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    Re: Difference between "backwash" and "rinse"

    Quote Originally Posted by Bama Rambler
    swimcmp -- You sure about that?

    Here's what the manual for my filter says about the rinse function.
    RINSE: From pump, through valve, downward through filter sand, up through center pipe to valve and out waste port. This position is used for start up cleaning and resettling filter bed after backwashing.
    This goes for water softeners as well.
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    Re: Difference between "backwash" and "rinse"

    In response to the last part of your original questions. Rinse is used after backwashing to clear out any remaining debris from the backwashing process. I personally backwash until waste line is flowing clear, then rinse for 20 sec to settle everything back in, then switch it back to filter.

    Waste is used for pumping water out of the pool (bypasses the filter)
    Recirculate is used to bypass the filter but still recirculate the pool water ( I sometimes use this when adding certain chemicals)

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