ponytug
Super Member
The pressure isn't necessarily low, as the output pressure can be "tuned" by how you set the check valve in it. An older relative had one a spring near the house that he ran at 100-110psi. The house had amazing pressure, but was a little prone to springing random leaks...Yep. With a flowing stream they work quite well. Low output but it is outputting 24/7 so...drawback is hardly any pressure at point of use. There are homebuilt one using nothing but pipe fittings. Neighbor had one feeding his house (50 gal barrel in kitchen) Pump was almost severy hundred yards away.
I'm not sure why he ran it so high.
Here's a video of a commercial ram running at 156psi or so. (110m of water height)
Many of the "free" designs for a water ram pump are actually quite inefficient as many people seem not to understand that water hammer benefits from a long straight run directly at the check valve. The one in the video above has a large radius sweep that helps.
All the best,
Peter