Drinking tube that clears most types of waters for drinking right away. Commercially available. About 5 US$ per device that provides water for (...) Rainwater Harvesting for Drylands (Vol. 1) Rainwater Harvesting for Drylands (Vol. 1): Guiding Principles to Welcome Rain into Your Life And Landscape: a book sold for about (...)

Visual Pump Glossary

About existing and available common pump technologies. Really thorough, but not much very low technology.