When an accident has occurred with a road tanker it is important to be able to remove all explosive and inflammable products safely and quickly. The emergency drain valve enables this.
With hose
Mounted in the manhole cover, it gives each compartment a 2” kamlock coupling that emergency services can connect to. Should the road tanker be overturned on its’ side, the hose will still be dipped into the product and the compartment will be emptied so much that the manhole cover can be removed without spillage.