Submitted by pjenkins on Thu, 11/07/2013 - 4:38pm Tool Concept Stage: Prototype License: This work is licensed under a Creative Commons Attribution 4.0 International License. Description: Wirtz pump, passive water pump. Paddle wheel pump on open water irrigation ditch fills elevated 500 gallon water tank which then gravity irrigates greenhouse.Add new comment Documentation Documentation Wiki: Detailed description of design, construction, materials here: http://vimeo.com/26307419 Additional notes here: http://www.youngfarmers.org/farmhack-projects-paddlewheel-powered-pump/Add new comment I like this tool up0 users have voted. I built (or modified) this tool up0 users have voted.