Square D,PRESSURE SWITCH 575VAC 5HP G +OPTIONS,2-way pressure release valve-pulsation plug,20...40 psi,65...200 psi,40...170 psi,DPST,General Purpose (Indoor),NEMA 1,Pressure Switch,Pumptrol,Screw Clamp,UL listed, CSA,control electrically driven water pumps and air compressors