solar water heatering system perfect design low heat loss, with high efficency, ... 6mpa6) Heat preservation: 72h7) Hail resistance: 25mm8) Tube standards: 14, 16, 18, 20, 24, 30, or 36 Heat Pipes ... and Expansion Vessel. Use this work station in the complete system (Split high pressure solar water heater) , just make ... pressurized solar water heater solar water heating system (ISO,CE,Solar Keymark)