Fleck 5800 Valve Ideal for smaller applications, the 5800 valve provides a 21 GPM service flow rate and 17 GPM backwash flow rate. A variety of connection options are available, ranging in size from ¾” to 1", covering most residential homes. Features and Benefits: Fiber-reinforced polymer valve body for superior strength and durability, non-corrosive, and UV-resistant Continuous service flow rate of 21 GPM with a backwash rate of 17 GPM Backwash capability accommodates softener tanks and filters up to 16" 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 Optical sensor for precision cycle positioning Soft water refill for a cleaner brine tank Designed with double backwash for reduced hardness leakage Diagnostics for historical valve performance Programming stored in memory and will not be lost due to power outages Accessories and Options: Filter or softener control valves Downflow co-current or upflow counter-current regeneration Plumbing connections in 3/4" or 1" NPT, BSP, and Sweat Fiber-reinforced or polymer stainless steel bypass valve Variable reserve for increased efficiency Programmable regeneration types for increased flexibility Three color bezel options of black, silver, and blue