Fresh water pump Fresch Water System - Electric Fresh Water Pumps - Jabsco by Max 3 Jabsco by Max Series Pressurized Water Pumpsthese Classic Pulsation-Free Diaphragm Pumps Controlled by Pressure Switches and Long-Life Motors Are Quiet, Self-Priming and Can Run Dry Without Damage. Quick Connectors for Quick Connection Are Included.jabsco by Max 33 Chamber Pressure Pump included. Cutoff Pressurebar Flow Ratel / Min Connection Voltagev outlet 1.7 bar 11 l / min 13 mm (1/2 ") 12 V 1 - 2 2.8 bar 11 l / min 13 mm (1/2 ") 12 V 1 - 2 1.7 bar 11 l / min 13 mm (1/2 ") 24 V 1 - 2 2.8 bar 11 l / min 13 mm (1/2 ") 24 V 1 - 2