The Hydraulic Ram: Pumping Water Uphill - Farm Collector
Hydraulic ram - Wikipedia
How the Green and Carter water hydraulic ram pump works - also makers of Hydraulic rams, hydram, water powered pumps, vulcan ram, blake ram, easton ram and vacher ram.
How to Make Free Energy Water Pump - Ram Pump - YouTube
Homemade Hydraulic Ram Pump for Livestock Water | Land-Grant Press
Hydraulic ram pumps - Appropedia, the sustainability wiki