If you have testing equipment, Zimi's valve leakage rate is far superior to its competitors.
We received feedback from a user on the Reddit forum that they felt the black breathing valve was leaking. We immediately sampled the relevant products and filmed some testing videos. Our sampling did not find any substandard valves. The GB2626 standard stipulates that the leakage of breathing valves should be ≤30ml/MIN. No substandard valves have been found in the past three years. Although Zimi made an incorrect choice of breathing valve in March 2023, resulting in a substandard valve, a new valve was updated in May 2023, and no substandard valves have been found since. Of course, our valves undergo high-pressure gas cleaning of the diaphragm surface before leaving the factory. If you find that the valve diaphragm is bent, please do not use it; simply open it and reinstall it.