... solar water heater 2:Aluminum Alloy frame 3:CCC,CE,ISO9001:2000 4:Produce as customer's requirment Low pressurized solar water heaterSpecifications1.Solar ... is one of the most common used solar water heating system for household, hotel, hospital, project application etc ... non-pressurized, water flow depending on gravity water head. This system matched with vacuum tube solar collector. Water flow inside ...