Weathermatic 12024EF-10 1" Silver Bullet Sprinkler Valve with Flow Control Reverse flow design for water conservation in the event of failure Diaphragms self cleaning ports constantly flex, inhibiting sand and silt from blocking valve action Molded shock cone for smooth operation and reduction of water hammer Easy-to-use internal manual bleed lever; bleeds valve downstream Marine-grade S20P solenoid with stainless steel actuator