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Thread: 300lb Sand Changeout

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    Backglass's Avatar
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    Jun 2007
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    Putnam County, NY
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    300lb Sand Changeout

    Hey All,

    I spent Sunday changing out 300 pounds of sand in my filter and thought I would pass on some tips I learned along the way. I completely forgot to take pictures, but really there wasn't much to see.

    This is my filter:
    Hayward 244S

    The filter has a date stamp of 1995 on it, and we bought the house three years ago. I wouldn't doubt if the sand was original. The filter worked OK, but the unknown quality of the sand always bugged me.

    I didn't even shut down my pump...I just placed it on Recirculate. After opening the drain plug and popping the top, I realized that digging the sand out by hand was an exercise in insanity. So I got my shop-vac out and used those long rigid extension tubes to suck out the sand. It was slow going vacuuming up wet, nasty sand, but it was MUCH faster than digging it all out by hand. You just have to pause often to empty the vac. After a couple hours I made it down to the laterals, all of which were in good shape (Whew!). I would periodically take a garden hose and wash down the inside of the filter to get as much sand as I could out. I couldn't get it all, so there was probably 1/2" or so of old sand in the bottom, under the laterals. The shop vac actually worked better if there was some water in the tank. It had better "suckage" on slurry then moist sand. I was stunned at the nastiness of the sand. There was SO much junk and clumps that weren't getting backwashed out.

    To re-fill, I just took a plastic cup and placed it upside down over the inlet pipe so sand wouldn't get into it. I then filled up the filter with water about halfway to help cushion the laterals from the incoming sand. The first two 50# bags I poured very slowly, reaching in and leveling it out with my hand. After the laterals were covered I poured the next four bags much faster, still leveling after each bag.

    After buttoning it all up, I backwashed the new sand for a good five minutes. I thought I would have to go much longer, but the water ran clear quickly. Then a few minutes on "rinse" to settle everything out and back to filter.

    The first thing I noticed was the pressure drop with the new sand. My starting pressure was 16 with the old sand and I would backwash at 21. The new sand pressure was 12.5. I considered going with Zeolite, but have always been perfectly happy with good old sand and just couldn't see paying the extra $$$.

    I thought this was really going to be a big chore, but it was actually VERY easy. If this is on your "Pool To-Do" list and you have a shop-vac, it's a 3 out of 10 on the difficulty scale. Just be prepared to spend all afternoon doing it.

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    duraleigh's Avatar
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    Apr 2007
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    Re: 300lb Sand Changeout

    Backglass,

    Thanks for that very thorough, informative post. There is nothing that will take the place of a "hands on" report.......I hope thousands of folks all read this. Thanks!!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Crzyfrlss1's Avatar
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    Jun 2008
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    Central, CT
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    Re: 300lb Sand Changeout

    Very nice writeup

    Now I see the value of a side mount valve too.
    Intex 15' X 48" metal frame pool
    Waterway Supreme 1hp 2 Speed pump
    Hayward X-Stream 150 Sq. Ft. Cartridge Filter
    2-2'x20' Sungrabber Solar Panels hooked up in parallel on a Goldline GL-235 controller.

    Not getting "Pool Stored" = Priceless!!!
    Thank you TFP

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    Re: 300lb Sand Changeout

    GREAT *FIELD REPORT* !!

    Whether or not you'd read the suggestions here for replacing sand - you nailed it!

    Glad you've got the new sand and lower pressure.
    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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    Re: 300lb Sand Changeout

    If duraleigh ever needs to change out his sand, I for one would rather enjoy watching that. 925 lb. sand filter!

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    Re: 300lb Sand Changeout

    Quote Originally Posted by 257WbyMag
    If duraleigh ever needs to change out his sand, I for one would rather enjoy watching that. 925 lb. sand filter!
    2 hours and a 6 pack is all it would take (and, Dave, 200 lbs of pea gravel )
    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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    Crzyfrlss1's Avatar
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    Re: 300lb Sand Changeout

    Quote Originally Posted by 257WbyMag
    If duraleigh ever needs to change out his sand, I for one would rather enjoy watching that. 925 lb. sand filter!

    Forget the shop vac.

    Gonna need a semi or full trash pump for that

    Or the kind of vacuum truck they use to clean out sewer drains
    Intex 15' X 48" metal frame pool
    Waterway Supreme 1hp 2 Speed pump
    Hayward X-Stream 150 Sq. Ft. Cartridge Filter
    2-2'x20' Sungrabber Solar Panels hooked up in parallel on a Goldline GL-235 controller.

    Not getting "Pool Stored" = Priceless!!!
    Thank you TFP

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    Join Date
    Feb 2010
    Location
    Houston, TX
    Posts
    271

    Re: 300lb Sand Changeout

    Could you imagine the freight charge if he ordered it online?

    Alright, I'm going to the corner for my timeout...
    John

    24' round Vogue AGP 12,000 gal. Flotec AT251001-01 1HP pump, Hayward S310T2 sand filter, Aquarite SWG T-15
    TF-100 (found at TF Test Kits) with Speedstir and Samplesizer

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