fluid dynamics - How does an hydraulic ram pump work? - Physics Stack Exchange
Ram pump — Low-tech Lab
Homemade Hydraulic Ram Pump for Livestock Water | Land-Grant Press
Ram Pumps - Sustainable Preparedness
Can You Really Pump Water Without Any Electricity? | WIRED
Sustainable living info, courses, products & services | lowimpact.org
Hydraulic Ram Pumps, What is Hydram? - Installation
TecQuipment | HYDRAULIC RAM PUMP
How the ram pump works - YouTube
fluid dynamics - How does an hydraulic ram pump work? - Physics Stack Exchange
Technologies
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.