Fiber-reinforced polymer valve body for superior strength and durability, non-corrosive, and UV-resistant Continuous service flow rate of 20 GPM with a backwash of 7 GPM Backwash capability accommodates softener tanks up to 12" and filters up to 10" in diameter. Fully adjustable 3- or 5-cycle control for efficient and reliable water treatment system Time-tested, hydraulically-balanced piston for service and regeneration Designed with double backwash for reduced hardness leakage Rugged-built electromechanical timer designed with heavy-duty 3/8" wide plastic gears.