Optimised hydrant security AVK launched the latest hydrant security device in 2014, working closely with United Utilities Operations and initially placed several units under trial in an area of severe hydrant abuse in Liverpool. It was tested against the industries standard outlet protection. Protecting the outlet, only, and manufactured from a plastic outer shell, and metal internal core. Following a period of two weeks, every single one of the non-AVK outlet caps were either forcibly removed or damaged beyond use. The AVK device however proved 100% successful, offering resistance to attempts removing the device. Following, from these trials, United Utilities adopted the Series 29/10 security device as their standard hydrant security to combat illegal use, and general vandalism throughout

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