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Thread: Sand Filter Backwash Time

  1. Back To Top    #1

    Join Date
    May 2013
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    North East Ohio
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    953

    Sand Filter Backwash Time

    Ok...I tried searching and found lots of conflicting info, so figured I would start fresh.

    NEW - my system on HI ran at about 10 PSI. When it got to 12 PSI I would backwash.

    Within 30 seconds or so the water ran clear, so I let it go a bit longer, then did a rinse for maybe 30 more seconds and called it a day.

    In doing that a few times, I've noticed that now my pressure STARTS at 11 PSI, then 12 PSI when "clean". I've basically done the same routine - meaning after 30 seconds the site glass is clear, so I let her go another 30, etc.

    HOWEVER - in some posts I've seen you backwash for 5 minutes - that seems crazy long ?

    Anyways...I know there is no magic, but I assume I am just not running my backwash long enough ? Or will I NEVER get back to my BRAND NEW 10 PSI and over time it will slowly creep up.

    I never had a swamp, etc...so my filter has just be doing the NORMAL amount of work. Have not put DE in yet, as my water is clear (albeit still see junk at night floating).

    Thanks for any advice.
    14,750 GAL IG Fiberglass (16 x 33) NE Ohio || Jandy 1HP 2 speed Pump || Waterco MultiCyclone 16 Centrifugal pre-filter (removed due to not working with sand filter) || 30" 575 Lb. Sand Filter || AquaCal 140K BTU Heat Pump || Solar Cover || Inter-fab Adrenaline Slide || GLI Monsoon Solar Cover Reel || K-2006C Test Kit || BBB with Liquid Chlorine Stenner Injection || Rayner Mighty Mesh Winter Cover

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
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    Apr 2007
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    SW Indiana
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    9,090

    Re: Sand Filter Backwash Time

    A pound or two variation isn't a big deal, and your filter actually works better with a little dirt in it. I backwash until clear much of the time, but whenever the pool has too much water in it I will backwash for several minutes. 3-4 minute backwash time isn't excessive if you need it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    May 2013
    Location
    North East Ohio
    Posts
    953

    Re: Sand Filter Backwash Time

    Ok, sounds like my OCD is kicking in....

    Thanks,
    14,750 GAL IG Fiberglass (16 x 33) NE Ohio || Jandy 1HP 2 speed Pump || Waterco MultiCyclone 16 Centrifugal pre-filter (removed due to not working with sand filter) || 30" 575 Lb. Sand Filter || AquaCal 140K BTU Heat Pump || Solar Cover || Inter-fab Adrenaline Slide || GLI Monsoon Solar Cover Reel || K-2006C Test Kit || BBB with Liquid Chlorine Stenner Injection || Rayner Mighty Mesh Winter Cover

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