Become a TFP Supporter Welcome to our new server and new forum software. Pool School
Results 1 to 6 of 6

Thread: What size sand filter do I need for my pool?

  1. #1

    What size sand filter do I need for my pool?

    While the pool is down for the winter, I've decided to move away from my current cartridge filter for various reasons. I think I've decided I want to use a sand filter with a little DE added to it. The problem is that I've read conflicting information on the size of sand filter that is needed. I've read that two turnovers in 8 hours is sufficient for a filter. Then I've read that about 3.0 feet of filtering area is recommended for a small IG pool.

    Here are my current pool specs:

    Astral Pools USA pump - IGP2010 1HP:
    http://www.astralpoolusa.com/index.php? ... Itemid=310

    I have a replacement pump (Pentair 3/4 HP) as a backup since I thought my old pump died about a year ago but I got it fixed before the replacement one arrived.
    http://www.pentairpool.com/pool-owner/p ... ps-165.htm

    A pool calculator says I have about 8600 gallons of water in my pool, which is pretty small for an IG pool.

    I'm looking at three sand filters due to cost/benefit ratio:

    1) Hayward 18" S180T (can purchase for about $190 shipped)
    2) hayward 21" S210T (can purchase for about $240 shipped)
    2) Hayward 24" S244T (can purchase for about $305 shipped)
    http://www.hayward-pool.com/prd/In-Grou ... 5516_I.htm

    I know bigger is better for a filter but we don't have a ton of money to spend at this time. If I have to backwash every month that is OK but I don't want to backwash every week.
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

  2. #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    20,986

    Re: What size sand filter do I need for my pool?

    Given your situation and having a 1hp pump I'd go with the 210. If your pump was a 2-speed you could get by with the 180.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit
    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  3. #3

    Re: What size sand filter do I need for my pool?

    Thanks Bama Rambler!

    The 18" is out for sure. I'm probably going to try and get the 24".
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

  4. #4
    Senior Member CUTiger78's Avatar
    Join Date
    May 2009
    Location
    NoVA
    Posts
    429

    Re: What size sand filter do I need for my pool?

    I've got an S244T.

    No matter which of the 3 you get (and, for <9K gals, I'd go with the S180T), put unions in so that you can get the top of the filter off w/o cutting pipes. If you ever want to get into the filter, you'll be happier. With getting into the filter in mind, have you considered a a side-mount model, like the S210S?
    36K gallon 42X22 gunite/plaster kidney-shaped IG;
    1 hp Hayward Super Pump (new in 2012);
    Hayward S244T sand filter w/ Zeosand (both new in 2009);
    175K BTU LAARS Lite2 LG natural gas heater; Polaris 380;
    TF-100 test kit.

  5. #5
    Junior Member In the Industry

    Join Date
    Dec 2011
    Posts
    5

    Re: What size sand filter do I need for my pool?

    A few simple calculations can be utilized to properly size a sand filter.

    Volume divided by desired turn over (in hours), divided by 60. (60 mins)

    Lets say for instance you want a 4 hour turnover

    Pool = 8600 Gal, divided by four, divided by sixty = 35.8 gpm This would be your target flow rate to achieve your 4 hour turn over.

    An easy way to further calculate your GPM into required square ft of filtration area is...

    15 gpm per sq ft, divided by 38.5 = 2.38 sq ft or required filter area for 4 hour turn over.


    Now if you want to turn your pool over every 6.4 minutes...give me a call...


  6. #6

    Re: What size sand filter do I need for my pool?

    Thanks for the follow up replies!

    I was able to get the S244T through an Amazon open box special for $253 shipped about two weeks ago. The freight company is supposed to deliver it tomorrow morning. I'll assess what plumbing components and I'll definitely use unions.
    Pool Size: 8600 gallons - rectangle 12'x24'
    Pool Type: Inground with vinyl liner
    Filter: Hayward Pro-Series S244T - 300# Sand Filter
    Pump: Astral Pools IGP2010 - 1HP

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •