filter ft2

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I

Iolly

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Nov 21, 2018
28
Seminyak Indonesia
Hi, just a simple question that ,hopefully, solve my dilemma : when i read the specs of cartridge filter compare to sand filter, many time i found many difference on the sqft or ft2. i mean on the cartridge filter for example a hayward c1200 it say: 120 ft2 on the ''effective filtration area', instead on a sand filter let say hayward s360t2 it say 7.06 on the ''filter area(square ft)''... the 2 filter are barely the sameon the flow rate gpm and even the turnover for 8-10-12 hrs are the same.
what is the difference?
thank you
 
A cartridge filter removes smaller debris so will collect more dirt over the same run time. Also, the sand filter collects dirt within the first few inches of sand while the cartridge is mostly on the surface of the cartridge. However, overall the sand filter will still need to be cleaned more often than a cartridge filter because of the smaller collection area.
 
thank you for you reply,
probably i didnt explain well.
i would like to understand what is the difference in each specs when on the cartdrige filter they sayd 120ft2 and on sand filter they say 7,03 ft2 , where all the other specs are the same (gpm and turnover)


mas985 said:
A cartridge filter removes smaller debris so will collect more dirt over the same run time. Also, the sand filter collects dirt within the first few inches of sand while the cartridge is mostly on the surface of the cartridge. However, overall the sand filter will still need to be cleaned more often than a cartridge filter because of the smaller collection area.
Click to expand...
 
The square footage of the filter is the surface area that's exposed to water flow.

Sand, DE and Cartridge filters each have different recommend flow rates per square foot.
 
That is the surface area of the media and the sand filter has a much smaller surface area than the cartridge. The sand filter has sand which is much tougher than the the cartridge media so can handle much higher flow rates per sq-ft of surface area. But the downside as I explained in my post is that sand doesn't filter as well and requires more frequent cleaning.
 
Recommended filter flow rates:

Sand...........15 gpm/sqft
DE...............1 to 2 gpm/sqft
Cartridge....0.375 gpm/sqft

What is your intended flow rate?

Is this a residential pool or a public pool?

What is the pool volume?

What pump will be used?
 
My pool is a residential pool with 16.500 gal,the pump is a intelliflo vs.
the pipe are 1,5.
Pump room is in ground .
due to my location ,Indonesia,I’ve got limited filter due import issue.
the Hayward c1200 (120 ft2 120 gpm ) for example is the biggest cartridge filter Hayward can import here. On the sand filter the biggest is pentair tagelus ta100 (7.06 ft2 100 gpm)
what is the best option?




JamesW said:
Recommended filter flow rates:

Sand...........15 gpm/sqft
DE...............1 to 2 gpm/sqft
Cartridge....0.375 gpm/sqft

What is your intended flow rate?

Is this a residential pool or a public pool?

What is the pool volume?

What pump will be used?
Click to expand...
 
The TA100 is 4.9 sqft. At 20 gpm per square foot, that makes about 100 gpm, but I would suggest that the flow be kept below 75 gpm.

Either filter should be ok.

I would suggest that the pump be limited to about 2,400 rpm max and probably about 1,200 to 1,725 for normal operation depending on the required flow.
 
Thank you very much for the suggestions,i really need it. much appreciated.

someone told me that 100-120 ft2 are not enough for my 16'000 gallon pool, so the pool will be all time dirty..is it right or not?

JamesW said:
The TA100 is 4.9 sqft. At 20 gpm per square foot, that makes about 100 gpm, but I would suggest that the flow be kept below 75 gpm.

Either filter should be ok.

I would suggest that the pump be limited to about 2,400 rpm max and probably about 1,200 to 1,725 for normal operation depending on the required flow.
Click to expand...
 
The smaller filter will need to be cleaned more often. But will still work based on flow rates as JamesW shows.
 

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Iolly said:
Thank you very much for the suggestions,i really need it. much appreciated.

someone told me that 100-120 ft2 are not enough for my 16'000 gallon pool, so the pool will be all time dirty..is it right or not?
Click to expand...

Why can't you get the bigger filter?

In any case, either filter should work. I recommend that the maximum flow be kept below 50 gpm.

There should never be a reason to exceed 50 gpm. In most cases, 15 to 25 gpm should be plenty unless you have equipment, like a gas heater that requires more flow.
 
Unfortunately I can not buy a bigger filter due restriction to import some equipment,I live in Indonesia , the biggest cartridge filter can be found here are: Hayward c1200 or pentair c100.
sand filter the biggest is pentair tagelus ta100


JamesW said:
Why can't you get the bigger filter?

In any case, either filter should work. I recommend that the maximum flow be kept below 50 gpm.

There should never be a reason to exceed 50 gpm. In most cases, 15 to 25 gpm should be plenty unless you have equipment, like a gas heater that requires more flow.
Click to expand...
 
Ok, I think that you would do well with a low flow rate. Running longer with a low flow rate is generally better than running shorter time with a high flow rate.

I would recommend that you immediately program the maximum speed to 2,400 before even running the pump.

And then run as slow as possible while getting good skimmer action and circulation.

Also, I recommend that you get a surge suppressor for the power supply to protect your new pump.
 
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