Al, thanks for the response. Initially I was told one thing, but then spoke with the person that runs the department. He did inform me that the higher pressure is used to run the ventilators in critical care situations – therefore making it patient respiration & answering my questions. The manifold has been in use for 20-30 years and hasn’t been written up until now. He said they only use it once or twice a year so I was just seeing if someone had ran into this elsewhere or might have another idea to prevent them from having to purchase a new manifold, zone valve, alarms, manifold room, etc. I have seen other facilities that have a high pressure cylinder secured in the room with a regulator and hose to connect to the bed when needed as I’ve seen this in other Hyperbaric locations. Maybe they can go this route.