Protection for the channel. Self-drain valve

AUTODREN is an efficient self-regulating drain device that acts as a spillway (in work spaces in concrete channels) due to the pushing and pressure that they are subject to from the effect of outside water. Water accumulated  through their paraments by filtrations or groundwater level.

Provides watertightness and at the same time avoids possible breakages or cracking in the mentioned channels due to the sub-pressure effect.