Compact pressure solar water heater 1.100-300L 2.CE,ISO9001,CCC ... copper pipe for exchange hot,high efficient, keep water more clear.3. this product is most suitable ... controller,that together complete autumatic, and can work in bad weather, if one tube is broken,still ... no leak4. collector tubes according water tank capacity, can design for customer,made with different types.5.hailstone:resistance ...