The 533H Series PresCal Compact pressure reducing valve (PRV) is precision engineered to deliver accurate pressure regulation. Low internal pressure losses produce superior falloff performance enabling more flow capacity to fixtures. The valve is ICC-ES certified to ASSE 1003, CSA, NSF 61, and NSF 372 (low lead laws). Available for ½” and ¾” pipe sizes in a variety of inlet connection styles, PresCal’s self-contained cartridge with stainless steel mesh filter allows for maximum debris protection and convenient in-pipe cleaning or replacement.