Making hot water is sometimes overlooked in prepping or survival situations.
Some guys are just plain clever in how they go about making hot water. Heres an innovative idea from one of those very clever guys!
Make it yourself hot water on demand heater that can supply you plenty of hot water in an off-grid situation. Made with used parts, no pump required and uses a Stovetec Rocket stove to start this thermo siphoning process.
This guy has been heating 150 gallons to 185 degrees every day for 8 years!