Explosion-Proof Floor Drain

This product is applicable to floor drain devices of all civil air defense basements below Grade 4, whether newly built or reconstructed.

It is installed on drainage pipelines of civil air defense projects. In peacetime, the drain remains open to ensure normal drainage and prevent odor backflow. In wartime, lower the drain cover and tighten it counterclockwise to fully seal the drain outlet, blocking blast waves and toxic agents from entering the civil air defense basement.