Locking drain covers prevent the unauthorized removal of the cover to stop prevent staff from dumping trash, debris, or other unwanted materials into drains. They feature a tamper-proof bolt that only authorized personel should have access to. The "one-bolt" feature is much easier to install than the typical small screws found in drain covers. Below is just a sample of the locking drain covers available. Contact us if you don't see the drain cover you need. All restaurants, food manufacturing plants, and commercial facilities should use these drain locks to reduce the misuse of drains, prevent drain blockages and damage to the plumbing system.