These modular units incorporate up to 6 isolation valve boxes as well as an Area Medical Gas Alarm Panel. Each isolation box is designed to allow for gas sampling, purging, emergency supply connection and testing. Gas type and valve position can be instantly determined through the see-through glass panels that make up the front of each valve isolation box. Service can easily be isolated during maintenance and system alterations to ensure safety of the gas supply at all times. They allow staff to control medical gas and vacuum systems at the entry point to wards and other locations.