... . 100L-1000L 2, CE/PED approved, high quality 3, OEM/ODM 4, Food material SUS304/316L Heat pipe solar water heater features1. The ... . Expansion vessel: 5L, 8L, 12L, 19L, 20L, 24L 12. Pressure resistance: 10 bar pressure for expansion vesselHeat pipe solar water heater ... .875 m²Working stationSP106, SP116,SR962 working stationHeat exchanger length18m High Quality of China Heat Pipe Solar Water Heater