An automatic water provision system is one of the foundations of a Global Village infrastructure. Yesterday we got one step closer to this with a successful demonstration of an air-powered water pump that Guy suggested. We will install this pump in our well, which we dug last year and which still has a manual pump handle. This will add an automatic sub-surface water source to our existing rainwater collection system, which we pressurize in a water pressure tank for distribution to the solar shower, sink, and dish washing station by the garden. Here are the results:
The good part is that the materials for the pump cost $30 (a bit lower than $600 off-shelf versions), not counting the air compressor or automatic timing. The next step is to add an automatic timer, connected to a solenoid, to turn the air pressure from the compressor on and off at the required intervals. We estimate that the duty cycle may be two seconds on followed by 6 seconds off. The video shows about 2 and 2 second cycles, respectively. We would appreciate any help on electronic timer and solenoids of choice.
Build one for yourself in a couple of hours. Some instructions are found on the OSE wiki.