Pa
Parallel alternating operation system
Parallel operation
performance
performance curve
Phase-advance capacitor
Pipe silencer
Piping load
Piping resistance
Pit
pit barrel type
Plating
PPM
Pressure relief valve system
Pressure sensor
Pressure switch
Pressure switch for starting
Pressure tank
Pressure test
Priming
Protective device
pull-out type
Pump
Pump efficiency
Pump reference plane