In a non-anesthetizing area, NFPA 99 does not specify a requirement regarding the location of the area alarm pressure/vacuum sensor on which side of the zone valve?

In a non-anesthetizing area, NFPA 99 does not specify a requirement regarding the location of the area alarm pressure/vacuum sensor on which side of the zone valve?

• A. upstream side
• B. station outlet/inlet
• C. NFPA 99 does not specify a requirement
• D. source

Answer: (C)

NFPA 99 requires area alarms to detect loss of pressure or vacuum in a zone and to trigger alarms and protective actions, but it does not mandate a specific side of the zone valve for the area alarm sensor in a non-anesthetizing area. This gives design flexibility: the sensor must reliably reflect the zone’s status and prompt the proper alarm/automatic isolation, but the standard does not prescribe exact placement relative to the valve. Consequently, there isn’t a mandated requirement to place the sensor upstream, at the station inlet/outlet, or at the source; NFPA 99 simply requires an effective alarm arrangement without dictating a fixed location.

NFPA 99 requires area alarms to detect loss of pressure or vacuum in a zone and to trigger alarms and protective actions, but it does not mandate a specific side of the zone valve for the area alarm sensor in a non-anesthetizing area. This gives design flexibility: the sensor must reliably reflect the zone’s status and prompt the proper alarm/automatic isolation, but the standard does not prescribe exact placement relative to the valve. Consequently, there isn’t a mandated requirement to place the sensor upstream, at the station inlet/outlet, or at the source; NFPA 99 simply requires an effective alarm arrangement without dictating a fixed location.