Pressure Regulating Module. Operating Pressure: Up to 100 psi. Operating Regulation: 15 to 100 psi. Accuracy: +/- 3 psi. The PRS-Dial is an excellent means of regulating outlet pressure at the valve regardless of incoming pressure fluctuations. The visible scale makes adjustment quick and easy. The regulator fits all Rain Bird PGA, PEB, PESB, PESB-R, GB-R, EFB-C-R, BPE and BPES series valves. Regulates and maintains constant outlet pressure between 15 and 100 psi. Adjustment knob with detents permits fine-tune setting in 1/3 psi increments. Dial cartridge makes installation and adjustment quick, easy and accurate.