NFPA 99 outlines three manifold design alternatives for Category I and II facilities. Two of the the manifold alternatives incorporated liquid vessels. The intent of this article is to point out the pros and cons of liquid vessels to help with your manifold decision making and trouble-shooting.
Recently, a very unique, challenging and costly medical gas maintenance project was undertaken and completed at Cleveland Clinic. Because many medical gas systems installed in our older buildings are dated, some of the components did not meet current NFPA 99, Standard for Health Care Facilities, requirements.