The front assembly is an easily removable cover window with pull ring. The window conceal the piping and valves inside the box and labeled “Caution - Medical Gas Shut-Off Valves - Close Only in Emergency” Placement of the valves within the zone valve box shall be such that the removable window cannot be replaced when any valve is closed.
Clear viewing space shall be provided in the window to display the gas service, the area controlled by the valve, and the pressure gauges.