solar water heater temperature controller 1.Guarantee:15years 2.Certificate:SRCC,CE,Solar Keymark,ISO 3.Deliver time:Within 3 solar water heater temperature controller DescriptionVacuum tube58-1800mm co-axial ... valve,the tap water flow in the tank ,if the water is full,it will close the valve automatically solar water heater temperature controller(CE,CCC ...