Delavan 5950-117E-SB Quick Change 12-Volt Bypass Diaphragm Pump. Quick change design allows users to quickly and efficiently change pump heads in 60 seconds or less to save downtime. Pump Type: BYPASS. Max. Flow: 5 gpm. Max. Pressure: 60 psi. Max. Draw: 15.4 amps. Max. Fluid Temperature: 140° F. Port Sizes: 3/4" Quick Attach. Motor: 12V DC. Self-priming. Delavan Replacement Pump Head # PHA-5950-117E sold separately.