Frequently Asked Questions

What is a Gilman Ram Pump?

The Gilman Ram Pump is a hydraulic water pump that uses the natural energy of flowing water to move water to elevated storage tanks. It operates without electricity or fuel, making it ideal for off-grid and remote applications.

Does it work without electricity?

Yes, our ram pumps are 100% gravity-powered and require no electricity or diesel. They operate using the natural force of water hammer and need only a continuous water source to function reliably.

What is the required source of water?

The Gilman Ram Pump requires a continuous flow of water—such as from a river, creek, or a spring with a year-round, reliable supply. To operate effectively, the system also needs a vertical drop or "drive head," which provides the necessary pressure to power the pump.

How far and how high can the pump deliver water?

Depending on the model, the Gilman Ram Pump can lift water to heights of over 200 meters. Our low-lift MF Series is ideal for applications up to 20 meters. Gilman Ram Pumps are also capable of delivering water across long distances — from several hundred meters to several kilometers. Contact us today for proper sizing and recommendations tailored to your needs.

Where can I buy spare parts?

You can order spare parts directly from our product page or by contacting our customer service.

How long does installation take?

If the drive system is already done, a typical installation takes 4 to 8 hours for a standard smaller systems (MF10 and RP75). If full construction of the structures are to be done yet, the whole installation process would take 1 to 5 days for small ram pumps to up to 30 days (or even more) for larger rams. Difficult and challenging locations are also a factor in installing ram pumps. We provide a full installation guide with every unit. Contact Us if you need assistance.