... capacity can be from 1000L-30000L Split Pressure Solar Water Heater:Vacuum tubes assimilate the ... heating ability, Certificate, CE, CCC, ISO 9001, Solar Keymark.Features:1) Highest efficiency2) Furnished in good style ... ) It is the most reliable and economic system when manual controls are acceptable4) Silicon rings to ... steel plate4) Isolation: 50/55 polyurethane Split Pressure Solar Water Heater