1314.2 Medical-Surgical Vacuum Sources.

Medicalsurgical vacuum sources shall consist of the following: (1) Two or more vacuum pumps sufficient to serve the peak

calculated demand with the largest single vacuum pump

(2) Automatic means to prevent backflow from any on-cycle

vacuum pump through any off-cycle vacuum pumps. (3) Shutoff valve or other isolation means to isolate each

vacuum pump from the centrally piped system, and other

(1) The common intake is sized to minimize backpres sure in accordance with the manufacturer’s recommendations. (2) Each compressor can be isolated by manual or check

valve, blind flange, or tube cap to prevent open inlet

(3) Shutoff valve or other isolation means to isolate each

vacuum pump from the centrally piped system, and other vacuum pumps for maintenance or repair without loss of vacuum in the system. (4) Vacuum receiver. (5) Piping between the vacuum pump(s), discharge(s),

receiver(s), and vacuum source shutoff valve in accor

(5) Piping between the vacuum pump(s), discharge(s),

receiver(s), and vacuum source shutoff valve in accordance with Section 1308.5, except brass, galvanized, or black steel pipe which is permitted to be used as recommended by the manufacturer. (6) Except as defined in Section 1314.2(1) through Section

1314.2(5), materials and devices used between the med

(2) Each compressor can be isolated by manual or check

valve, blind flange, or tube cap to prevent open inlet piping when the compressor(s) is removed for service from the consequent backflow of room air into the other compressor(s). [NFPA 99:5.1.3.6.3.11(G)] 1313.6.3 Screening. The end of the intake shall be turned down and screened or otherwise be protected against the entry of vermin, debris, or precipitation by screening fabricated or composed of a noncorroding material. [NFPA 99:5.1.3.6.3.11(H)]