Refresh on hot days in the Fast Set Swimming Pool from Bestway It is quite easy to set up and holds up to 7340 L of water. Its round shape provides more area for swimming and playing. The extra strong side walls of this above ground pool are constructed with Tritech, a 3-layer reinforced material with a polyester mesh core encased between two layers of high gauge PVC material. The inflatable top ring supports the liner. The water can be discharged easily and quickly with the drain valve. Attach the valve to a garden hose (with the included adaptor). The swimming pool is also easily folded away for storage or transport when not in use. When in use, replace the pump cartridge once every 2 weeks.