... installation 4.Anti-freez,No maintenance Balcony Solar Water Heater, Technical Parameters: Heat Pipe Solar Collector Spec ... Switch, Anode magnesium bar, T/P valve, Relief valve Working Pressure 6.0 bar Hail Resistance Φ25mm Balcony solar water heater ... description:INLIGHT balcony solar water heater composes of balcony solar collector, storage water tank, workstation ...