Electric Pressure Control to Work in Series With our 23905 Electric Valve Solenoid, 20-25 PSI Discharge and RefillBest for Competition - Kit includes Moroso Part No. 23905 Solenoid Valve plus a Pressure Valve • Better than a regular manual electric valve — our Solenoid pressure valve allows only the needed volume of oil to be released for quicker filling and discharging • Screw-in sensor electronically activates when engine oil pressure drops below normal. When the engine returns to normal pressure, the accumulator refills automatically, ready for the next possible occurance • Best to use in remote mount situations, where accessing a manual valve is not an option • Easy three-wire hookup • Comes in two pressure ranges: choose the one that best suits your engine combination • Internal sensor electronically activates when engine oil pressure drops below normal. When the engine returns to normal pressure, the accumulator refills automatically, ready for the next possible occurance • Best to use in remote mount situations, where accessing a manual valve is not an option • Easy three-wire hookup • Comes in three pressure ranges: choose the one that best suits your engine combination