This electric valve works well under pressure because it’s designed to handle up to 200 PSI (13,8 bar). The glass filled nylon construction and reinforced rubber diaphragm ensure reliable performance. The 200 series valve has a working pressure range from 6 PSI (0,41 bar) minimum to 200 PSI (13,8 bar) maximum and recommended flow range from 5 to 150 GPM (19 to 568 LPM). This model is a 2".