Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Sand Filter Question

  1. Back To Top    #1

    Join Date
    Mar 2010
    Location
    Goldsboro, N.C.
    Posts
    41

    Sand Filter Question

    I have a Hayward sand filter and this will be our third season with the new pool. Do i need to change the sand this year? If not, is there a way to clean the sand other than backwashing? If so, with what and how?

    Also, the pool store always says to add the shock, baking soda,... into the deep end of the pool. However, i have read here that some pour it directly into the skimmer, which beats brushing around the bottom of the pool to be sure everything has dissolved. Is there a preferred method?

    Thanks,
    Stacy
    25,000 gal. I/G Vinyl Liner Pool; Pentair IC40 SWCG; 3/4 hp Hayward Pump with 244t Hayward Sand Filter

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: Sand Filter Question

    I pour my liquid chlorine in front of the return flow or directly into the skimmer -always with the pump running. Same with Borax when I needed to add a little. I poured slow enough that it appeared to dissolve before it hit the bottom but I brushed after just to make sure.

    There shouldn't be a need to change the sand yet - some folks go several years without changing it. It's not really necessary to "clean" it other than backwashing. Occasionally just open the filter up and check out how things look - check for channelling, etc.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: Sand Filter Question

    There are two schools of thought on replacing sand. Some people replace their sand every 5 to 7 years, while others will go more or less forever without replacing it. Either way, there isn't normally any reason to replace your sand after only 3 years.

    If you have never opened up the filter and had a look at the sand, now would be a good time to do that. It is a good idea to check the sand to make sure it isn't forming lumps, clean out any surface debris, and resettle the sand bed every two or three years. This post has a good description of how to resettle the sand.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  4. Back To Top    #4

    Join Date
    Mar 2010
    Location
    Goldsboro, N.C.
    Posts
    41

    Re: Sand Filter Question

    Thanks. Will definitely try that next week.

    Stacy
    25,000 gal. I/G Vinyl Liner Pool; Pentair IC40 SWCG; 3/4 hp Hayward Pump with 244t Hayward Sand Filter

  5. Back To Top    #5

    Join Date
    Mar 2010
    Location
    Goldsboro, N.C.
    Posts
    41

    Re: Sand Filter Question

    I went out to check on looking inside my sand filter and i have a question. It looks like to take my multi-port valve off to look into my filter, i am going to have to cut my 3 pipes loose since they are connected by 1-1/2 male connectors. Am i missing something?

    Thanks,
    Stacy
    25,000 gal. I/G Vinyl Liner Pool; Pentair IC40 SWCG; 3/4 hp Hayward Pump with 244t Hayward Sand Filter

  6. Back To Top    #6

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: Sand Filter Question

    Yes, three flush unions should be installed where you cut the pipes. Then you won't have to cut them again foing forward.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  7. Back To Top    #7

    Join Date
    Mar 2010
    Location
    Goldsboro, N.C.
    Posts
    41

    Re: Sand Filter Question

    Pardon my ignorance on this, but what is a flush union? Is it the same as a plain union or something different altogether?
    25,000 gal. I/G Vinyl Liner Pool; Pentair IC40 SWCG; 3/4 hp Hayward Pump with 244t Hayward Sand Filter

  8. Back To Top    #8

    Join Date
    May 2007
    Location
    South Central NJ
    Posts
    3,192

    Re: Sand Filter Question

    A flush union has two flat surfaces that meet, normally with an o-ring in one end.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

Posting Permissions

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