Features Fully adjustable, 5-cycle control delivers up? ow backwash, down? ow brining, slow rinse, rapid rinse, brine re? ll, and down? ow service Time-tested, hydraulically-balanced piston, seal and spacer, controls service ? ow and regeneration Non-corrosive, ? ber-reinforced polymer construction Excellent ? ow rates (19 GPM continuous, 24 GPM peak) Backwash capacity handles tanks up to 16" diameter for softener, and ? lter applications---- -- This is a valve for use on a water softener system. Does not include bypass valve. If you also need a new bypass valve, see our other listings for that part. Will ship with standard flow control for 9 or 10" tank unless you email us at time of order with request for other size tank this will be used on. Standard 1" distributor pilot. New