Compact Non Pressurized Solar Water Heater (with all glass v

Characteristics:
1. It is not easy to be frozen and cracked down even in hash weather.
2. The shortcoming of bursting of tube or water leakage due to aged rubber ring is eradicated;
3. The water tank is welded scientifically under the high frequency weld and argon-arc weld. The non-pressurized vaccum tube can be directly connected with tap water system to operate automatically with pressure-bearing.
4. Hot water can be used directly, or can be used as a pre-heat.
Compact Non Pressurized Solar Water Heater (with all glass v