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Thread: Newbie filter question

  1. Back To Top    #1

    Join Date
    Aug 2007
    Location
    Athens, AL
    Posts
    42

    Newbie filter question

    First let me say that my water is still clear and sparkling because of my test kit....keeping proper chlorine levels in accordance with the chlorine/CYA chart.

    I have a Hayward 300# sand filter. I dont have the particulars yet. What is the purpose of backwashing and how do I do this. Also when at the pool store for my first water test (before my test kit) the guy asked about my filter.....it runs at a constant 20psi and drops to zero when I turn it off. What pressure should it be and when and what is involved with a sand change, if that is necessary.

    Thanks In Advance
    Tony
    ______

    My Pool set up:

    28,000 gal, 40x32x16 True "L" IGP, 3-8.5 ft depth, Hayward 1.5hp Super Pump, Pro Seriews 300# sand filter, 2 skimmers, 3 returns, Barracuda III suction cleaner

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089
    Backwashing reverses the flow through the filter to clean the sand. You do it when there is a rise of 8 lbs or so in your pressure reading. Shut the pump off before moving the handle on the filter. Set the filter to backwash, and run the pump for a couple of minutes. Shut the pump off, switch the filter to rinse, and run for a minute or so. Shut the pump off and return to filter. Water will leave the pool through the waste line or backwash hose during backwashing and rinsing.

    The normal pressure depends on your particular pool, filter and pump. 20lbs is higher than many pools, but nothing to be concerned about. If I were you, I'd backwash and then see what the pressure is and treat that as your normal pressure.

    You'll probably never need to change the sand unless you have too much money and can't think of anything else to spend it on.

    John
    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
    Aug 2007
    Location
    Athens, AL
    Posts
    42

    Just backwashed

    I followed the directions and now on filter the pressure is at about 17 psi. Will keep an eye on it.
    Tony
    ______

    My Pool set up:

    28,000 gal, 40x32x16 True "L" IGP, 3-8.5 ft depth, Hayward 1.5hp Super Pump, Pro Seriews 300# sand filter, 2 skimmers, 3 returns, Barracuda III suction cleaner

  4. Back To Top    #4

    Join Date
    Mar 2007
    Location
    Coastalish 'down easter'
    Posts
    4,160
    I recommend a couple of backwash/ rinse cycles to fully get it clean.
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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