Weathermatic Threaded Sprinkler Valve 1" Fip with Flow Control 150 psi (10,3 bar) rating Reverse flow design for water conservation in the event of failure Diaphragm's 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; has positive stops for open and closed positions positive stops for open and closed positions