Whether used in irrigation, cooling nuclear reactors, pumping wastewater, or any number of other uses, the liquid piston engine is a much more efficient, effective, and "greener" choice than many other choices available to industry. Especially if being used in conjunction with solar panels, the liquid piston engine can be extremely cost-effective and has very few, if any, downsides or unwanted side effects. As industries all over the world become more environmentally conscious, the liquid piston engine will continue growing in popularity as a better choice, and its low implementation and operational costs will be attractive to end-users in developing countries. This is the only comprehensive, up-to-date text available on liquid piston engines. The first part focuses on the identification, design, construction and testing of the liquid piston engine, a simple, yet elegant, device which has the ability to pump water but which can be manufactured easily without any special tooling or exotic materials and which can be powered from either combustion of organic matter or directly from solar heating. It has been tested, and the authors recommend how it might be improved upon. The underlying theory of the device is also presented and discussed. The second part deals with the performance, troubleshooting, and maintenance of the engine. This volume is the only one of its kind, a groundbreaking examination of a fascinating and environmentally friendly technology which is useful in many industrial applications. It is a must-have for any engineer, manager, or technician working with pumps or engines.