... water heater system 1. Solar Keymark,SGS,CE, CCC, ISO9001 2. high quality&competitive product 3. 10 years experience solar water ... composed by heat collector, storage tank, electric control device, hot water mix unit and fittings for circulation and installation Specifications ... ) Steel tube dimensions: 58mm x 1.8m6) Water capacity: 150L, 200L, 300L,500L7) Pressure: 6 bar solar water heater system