Bestway's 1,249-liter filter treatment plant is essential for keeping pool water clean and disinfected during the summer months. This filter pump keeps clean water circulating as it pumps it out of the pool through a filter cartridge and then pumps it back into the pool. This Bestway pump comes with two tubes that connect at two different points in the pool. The end of one of the tubes connects to an inlet on the filter pump, while the end of the other tube connects to a power outlet. The water is pumped out of the pool and through the inlet tube and then disinfected by the filter cartridge and pumped back through the outlet tube. This process is repeated over and over again to provide clean, clear and hygienic water. Bestway's 1,249-liter filter pump comes with an instruction manual to guide you through the simple installation process.