Air tightness is a core quality indicator for sanitary products including shower heads, faucets and valve bodies. It directly affects user experience and brand reputation. The evolution of testing methods epitomizes the industry’s quality and technological upgrading.

In the early stage of the industry, small and medium-sized sanitary ware enterprises widely adopted the traditional “water immersion + soap bubble” testing method. It requires low investment yet suffers from low accuracy, heavy reliance on manual labor and lack of data traceability, making it incompatible with modern large-scale production.

As domestic and international standards such as QB/T 2639-2021 become stricter, leading brands raise quality requirements and the industry shifts toward automation, traditional testing methods are phased out, and precision air tightness testing has become mainstream.