Pressure-Pro 12 VDC Vertical Hot Box Water Heater 4000 PSI 6 GPM
This is perfect for use with 3-6 GPM pressure washers. Rated for 4000 PSI. Vertical coil has stainless wrap. Requires separate 12VDC power source to operate. Connect to battery used for electric start of pressure washer or connect to any 12-volt source (20 amp).