The negative pressure resistant rubber joint can withstand more external pressure from the pipeline, vacuum pipeline pressure, or negative pressure generated by the inlet and outlet of the water pump due to the addition of a pressure boosting ring inside. Due to the lack of integration between the internal boost ring and the rubber ball, it is important to pay special attention to its fit during installation. If it is too loose, it is important to contact the manufacturer. The curvature in the middle of the rubber joint itself is similar to a spherical shape. If the pressure boosting ring installed is too loose, it is likely to shift during operation and cannot function as a negative pressure.
