These are water pumps that just use energy extracted from the water source to pump water. I designed these for a friend many years ago who manufactured and sold them, but he passed away and his family asked me to keep them available as folks seem to prefer this design over other hydraulic ram pump designs. So we manufacture a batch every year or so. The Amish community love them as do folks who live off grid. If you place a storage tank sufficiently high above your home, you can generate sufficient domestic water pressure without using any electricity.
https://www.borstengineeringconstruction.com/Landis_Hydraulic_Ram_Pumps_for_Sale.pdf
Hydraulic ram pumps are relatively simple machines, but the physics that govern their operation is very complex and took me some time to properly work out and code into a calculator to allow accurate operational performance forecasting for different installation sites:
https://www.borstengineeringconstruction.com/Hydraulic_Ram_Pump_Performance_Calculator.html
I sell these on several sites such as Bonanza, Etsy, Sheepbuy, etc., but the best price is direct from my website. So if you or anyone you know is looking for something like this, please point them that way. It is likely best to send any questions to support@borstengineeringconstruction.com to ensure a timely response.
Thanks,
Bob Borst