"Air diaphragm pump"
Maybe someone knows more about it from the description.
I do not really understand how it works. Best guess is it has 2 stages?
They make a "Pssst ... Poof" sound at the well head.
Flush the toilet, then immediately turn the faucet on full blast makes "Pssst .. Poof.. Pssst .. Poof.. Pssst .. Poof".
Run a decent stream out of a faucet is "Pssst ...... Poof........... Pssst ...... Poof ............ Pssst ...... Poof".
Running a short duration trickle of water to rinse out a coffee cup may not make any noise, because there is enough volume stored in the pump to do it (there is no storage tank). Or it may do a single "Pssst ... Poof".
It is NOT a fast cycle like a typical diaphragm pump. Guessing the fastest I ever heard one go is maybe 75 "Pssst ... Poof" cycles per minute?
The end user would have no idea the faucet, garden hose, toilet, or shower was not a city water connection. Water flow does not pulsate (that I ever noticed).
I got in touch with a friend who has one, and he has no idea what the brand name is. He will try to find out. I think there are 2 name brands making them.
His has been in use without ANY maintenance or repairs for about 8 years? (a little less than since he built the house)
Pretty sure there were 8 people living there for a few years. 6 of them girls under 25. No chauvinistic implications implied, because mathematically girls under 25 use a LOT more water than guys!
Occupancy decreased as marriages increased.
And it is not uncommon to have 20 or 30 people there for dinner (lots of dishes to wash, lots of 'flushing' after dinner).
That's a LOT of water since it was installed.
I would call it a Very reliable pump,
if it can be efficiently rigged with the available resources.
G-