Removes water droplets from air by simply installing in vacuum equipment connection lines. Effective for removing water droplets from the air sucked into vacuum pumps and ejectors, etc. Over 90% of droplets can be removed through the use of a special water droplet removing element. The provision of a drain cock makes it possible to discharge the drain manually after breaking the vacuum. Even when the element is saturated with water, there is almost no drop in pressure (increase in resistance). The element can be replaced with a single touch.