Ideas

Galvanized steel water piping in Mexico, Nov. 2015:

Recho Mirak charcoal-saving stove (in French): Water level indicator (tested in El Salvador Nov. '11):

Perched Water Table, Adam B., April 6, 2011:

Water Harvesting, Adam B., April 6, 2011:

Float valve tank level control system idea:

Operating manual for water distribution systems (Spanish):

Submersible pump: []
 * Pump types**

Jacoby-Tarbox eductor pumps: []

Here is possible pump characteristics curve - head (ft) vs. flow (GPM):