solar water heater characterics: 1. it can be used for small and middle hot water projects. 2. easy installation 3. this kind of solar collector can be connected to use 4. it has high heat efficiency, and good price 5. dould side vacuum tube structure 6. we can produce the manifold with stainless steel, color steel or aluminium alloy. 7. the frame can be produced for galvanized steel and aluminium alloy, or according to our customer's requirements. 8. we can produce different kinds of frame for this solar water heaters.