The Intex 2100 GPH Above Ground Pool Sand Filter Pump with Auto Timer provides cool, refreshing, clear water, and less hassle every swim season. If you are tired of buying and replacing pool filter cartridges, this filter is the one for you. With virtually no maintenance, your sand pump only needs replacement every five years. Hydro Aeration Technology improves circulation and filtration, improves water clarity, and increased negative ions in the water. This sand pump features a powerful motor, 6-function control, and a built-in automatic timer. It meets the UL standards and is an excellent upgrade to the filter cartridge system on your Intex Above Ground Swimming Pool. This filter works with pools that are easily set with a metal frame, and ultra frame, up to 12,800 gallons. Simple to use and easy to operate, this Intex sand filter will outperform your standard cartridge filters and keep your pool crystal clear.