Build a Hydraulic Ram Pump

1 / 4
The completed hydraulic ram pump is a simple device.
The completed hydraulic ram pump is a simple device.
2 / 4
The pump in operation.
The pump in operation.
3 / 4
Cross-sectional diagram of the hydraulic ram pump.
Cross-sectional diagram of the hydraulic ram pump.
4 / 4
A stream of pumped water. 
A stream of pumped water. 

The search for a “perpetual motion” machine is just about as old as civilization itself. And though we all know that such a gadget probably doesn’t exist, there is a piece of equipment that comes pretty close: the hydraulic ram pump.

The water ram (also known as a trompe) has been around for quite a while and was a widely used means of pumping water before electricity became common in rural areas. Strictly speaking, the ram pump doesn’t create its own power but draws energy from the force of a moving column of water, usually fed through a pipe from a point more than 18 inches above the trompe.

Although the hydro ram won’t operate without a fluid power source, it will work indefinitely when water is present. And, except for an adjustment every few months, the device requires no maintenance whatsoever!

It’s a Bargain at 1/10 the Price…

Quality hydraulic rams are available commercially for anywhere from $400 to $800, complete. These are excellent units, designed to last for many years. However, most folks simply don’t have that kind of money to spend, so MOTHER EARTH NEWS’ research team came up with a pump that delivers the same reliable performance as its store-bought cousins but only costs about $60! Better yet, our version can be put together in less than an hour using off-the-shelf plumbing supplies.

  • Published on May 1, 1979
Comments (0) Join others in the discussion!
    Online Store Logo
    Need Help? Call 1-800-234-3368