Work well with Hard Water Tank capacity-200 LPD/Liters Ideal for maximum 4-5 person, 2 Bathroom Connection Application: Pressurized (Main tank can be at lower height then solar water heater tank) Safety Valve of 6 bar provided pressure pump operation. Glass Enamel lining in the inner tank provides strong protection against corrosion. Advanced Solar glass gives better performance in cloudy weather. Full plate absorber provides greater area for absorbing of sunlight resulting in faster heating of water. Maximum Hardness of Water should be less than 500 ppm Maximum Pressure: 6 bar Warranty- 1 year. Electricity Bill Savings: 900 units/year