integrated pressure blue titanium flat panel solar water heater Certificate: SRCC, Solar Keymark, CE and ISO9001 flat panel solar ... , pump station with controller, expansion vessel, pipings, connections, valves etc parts.The flat plate collector can be installed on the roof ... can be combined with gas boiler, oil boiler or electic heater.Size: 150L, 200L, 250L, 300L, 400L, 500L with single coil ...