Koolance PMP-300 Pump, G 1/4 BSP The PMP-300 is a compact pump with low power consumption. It features G 1/4 BSPP inlet and outlet threads and comes with a detachable steel mounting bracket, screws, and vibration dampening washers. Maximum Flow Rate: 7L/min (1.85 gal/min). Maximum Head Pressure: 2.6m (8.53ft). Motor: Brushless DC.