Everpure Endurance Quad High Flow Water Filter System EV943732Application: Multiple equipment & combination applications This is the largest of the three models of Everpure Endurance High Flow Systems. The other available systems are: EV943730 Endurance Twin High Flow EV943731 Endurance Triple High Flow The Quad system has a peak flow rate of 15. 00 gallons per minute and is rated for 200,000 gallons. The replacement cartridges for this system come as a kit. Please order part #EV962872 Quad Endurance Cartridge