The 51-Series is our Heavy-Duty water pump. It provides high volume water flow with reduced pump cycling, thanks to the large five-chamber diaphragm. These models are designed to run on water systems with no accumulator tank necessary, and up to five fixtures! It is also suited for use with a holding tank water system, as may be found in a boat, RV or remote cabin. It provides up to 5.0 gallons per minute. The 51-Series pumps are self-priming, and can run dry without damage, performance reliable and low current. This automatic demand water system pump has a built-in pressure switch, which automatically starts and stops the pump when the faucet is opened and closed. They are easy to install service and winterize.
Model | Voltage |
Open Flow (GPM/LPM) |
Control Type |
Max Draw |
Shut-off Pressure (PSI/BAR) |
Valves | Diaphragm | Ports |
Wire Connections |
NMDP1-050-060-51 | 12V | 5.0 / 18.9 | switch | 17A | 60 / 4.2 | EPDM | Santoprene | 1/2"-14 MNPT | 2-Pin/Leads |