Filtration, St. George Pool Services
Filtration cleaning: There are basically three types of filters that you can use to keep your pool clean. The type of filter doesn't matter, it's completely up to the home owner. Keeping the filtration system clean is vital to the overall health of your pool. Aside from the type of filter, there are different sizes to consider as well. Keep in mind that no matter what you have, you need to ensure that the pool filtration is happening properly, and that's where we come in. We can maintain a healthy filtration system or bring a filtration system back to optimal power so you can enjoy your pool!
Sand Filters: Sand filters use specific grade sand, and can filter down to 40 microns in size. There are other specific models that preform different, but in general, that's the size the filter can handle. Filter sand should be replaced every 3-5 years.
Cartridge Filters: Cartridge filters use a paper type cartridge for filtering. These produce about the same quality of water as the sand filters, but don't filter as low as the DE filters. These filters have a reputation for needing a lot of maintenance, but manufacturers have improved. Larger surface areas mean less maintenance work and now only need to be maintained twice per year.
DE Filters: DE filters use diatomaceous earth to filter. It can filter down to 5-8 microns in size. DE filtration powder needs to be replaced every time there is a vacuuming and then backwash afterward.
Once you know the filter and have it chosen, the next thing to choose is the size:
Flow Rates for CARTRIDGE FILTERS
Surface Area. 100 sq/ft 200 sq/ft 300 sq/ft 400 sq/ft. 500 sq/ft
Max Flow Rate 38 GPM 75 GPM. 112 GPM 150 GPM 150 GPM
Safe Flow Rate 30 GPM 50 GPM 75 GPM 100 GPM 125 GPM
Flow Rates for D.E. FILTERS
Surface Area 24 sq/ft 36 sq/ft 48 sq/ft 60 sq/ft 72 sq/ft
Max Flow Rate 48 GPM 72 GPM 96 GPM 120 GPM 144 GPM
Safe Flow Rate. 36 GPM 54 GPM 72 GPM 90 GPM 108 GPM
Flow Fates for SAND FILTERS
Tank Diameter 19" 21" 24" 30" 36"
Surface Area 1.8 sq/ft. 2.3 sq/ft 3.1 sq/ft 4.9 sq/ft 6.9 sq/ft
Max Flow Rate 40 GPM 50 GPM 60 GPM 100 GPM 140 GPM
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