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Thread: Is my filter undersized?

  1. Back To Top    #1

    Join Date
    Aug 2015
    Teutpolis, IL

    Is my filter undersized?

    Bought house with pool last fall and kept pool up for a month. Was miserable trying to clear the water with "help" from 2 different pool stores until I found TTP. Opened this spring and all is great after a few hiccups. One of those hiccups was accidentally pulling the laterals out of the sand trying to get top off to deep clean sand. Ended up replacing sand to put laterals back in place but they all seemed in great shape. When I went to buy sand was looking for the amount and found it only takes 100lbs according the manufacturer. Based on something pool guy said since I bought the sand at the pool store and reading forums and pool school like crazy wanted to make sure my filter and pump are not undersized. It is a 20 in round Pentair Meteor sand filter and on label for 20 in it states 100lbs so that is what we put in.
    Most of the labels on the pump are worn off and unreadable.

    Here is the info I can gather on the pump.
    Pentair Part: 0-193262-20 FR: W48Y Type: SP Form: PHM
    HP RPM:3450 HZ: 60 PH: 1 SF: Code: H

    I tried to do some searches but the info confused me so wasn't sure what was needed for my pool -- Above ground 18x33x4

    I know the equipment is older so wanted to be prepared in buying the right size if or when it fails instead of just replacing it with the same size that is there just because.
    18x33x4 oval Above ground pool- 15300 gallons, sand filter, full sun no shade
    tft-100 test kit
    Central Illinois

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: Is my filter undersized?

    I'd say a minimum 250 lb. sand filter for that size pool. As is, you'll just have to backwash it more often mostly.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Is my filter undersized?

    I agree with Woody, WHEN you have to replace it go with a 250lb sand or a 200sqft cartridge.

    Having said that I wouldn't replace it until it needed it.

    The numbers on the motor lead me to believe that it's a 1hp Dynamo pump. A pic would help, but you can look at them online and see if they match what you have.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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