... and level inner ank Auto filling water, Connect electrical heater, much safe. Complete ... centidegree4. Accuracy of temperature control: ±2 centidegree5. Water level grade: 5 grades 0,20,50,80,100 ... valve:0.02Mpa~0.8Mpa,apply to direct water supply.Working pressure of no pressure valve: ... water supply from water tank or low water pressure.10. Low power of color LCD screen:0.5W Solar water heater controller ...