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About product and suppliers:
        Alibaba.com offers 64,287 vacuum tube products. About 17% of these are solar water heaters, 8% are solar collectors, and 1% are pipe,drainage tubes & containers. 

A wide variety of vacuum tube options are available to you, such as vacuum solar collector, pressurized, and manifold collector. You can also choose from water heater, solar thermal, and air conditioning system. As well as from glass, copper. And whether vacuum tube is free samples, or paid samples. 

There are 63,711 vacuum tube suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Turkey, which supply 98%, 1%, and 1% of vacuum tube respectively. 

Vacuum tube products are most popular in Domestic Market, North America, and South America. 

You can ensure product safety by selecting from certified suppliers, including 27,750 with ISO9001, 9,657 with Other, and 4,864 with ISO14001 certification.