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713.11 Sterilizer vent stack sizes.
Sterilizer vent stack sizes shall comply with Sections 713.11.1 through 713.11.4.
713.11.1 Bedpan steamers.
The minimum size of a sterilizer vent serving a bedpan steamer shall be 1 1/2 inches (38 mm) in diameter. Multiple installations shall be sized in accordance with Table 713.11.1.
Stack Size (inches) | Connection Size | ||
1 1/2 | 2" | ||
Stack Size (inches) | Connection Size | ||
1 1/2 | 2" | ||
1 1/2
a | 1 | or | 0 |
2
a | 2 | or | 1 |
2
b | 1 | and | 1 |
3
a | 4 | or | 2 |
3
b | 2 | and | 2 |
4
a | 8 | or | 4 |
4
b | 4 | and | 4 |
For SI: 1 inch = 25.4 mm.
a. Total of each size.
b. Combination of sizes.
713.11.2 Boiling-type sterilizers.
The size of a sterilizer vent stack shall be not less than 2 inches (51 mm) in diameter where serving a utensil sterilizer and not less than 1 1/2 inches (38 mm) in diameter where serving an instrument sterilizer. Combinations of boiling-type sterilizer vent connections shall be sized in accordance with Table 713.11.1.
713.11.3 Pressure sterilizers.
Pressure sterilizer vent stacks shall be 2 1/2 inches (64 mm) minimum. Those serving combinations of pressure sterilizer exhaust connections shall be sized in accordance with Table 713.11.3.
Stack Size (inches) | Connection Size | |||
3/4" | 1" | 1 1/4" | 1 1/2" | |
1 1/2
a | 3 or | 2 or | 1 | — |
1 1/2
b | 2 and | 1 | — | — |
2
a | 6 or | 3 or | 2 or | 1 |
2
b | 3 and | 2 | — | — |
2
b | 2 and | 1 and | 1 | — |
2
b | 1 and | 1 and | — | 1 |
3
a | 15 or | 7 or | 5 or | 3 |
3
b | 1 and | 1 and 5 and | 2 and | 2 1 |
For SI: 1 inch = 25.4 mm.
a. Total of each size.
b. Combination of sizes.
713.11.4 Pressure instrument washer sterilizer sizes.
The diameter of a sterilizer vent stack serving an instrument washer sterilizer shall be not less than 2 inches (51 mm). Not more than two sterilizers shall be installed on a 2-inch (51 mm) stack, and not more than four sterilizers shall be installed on a 3-inch (76 mm) stack.
714.1 Design of drainage system.
The sizing, design and layout of the drainage system shall be permitted to be designed by approved computer design methods.
714.2 Load on drainage system.
The load shall be computed from the simultaneous or sequential discharge conditions from fixtures, appurtenances and appliances or the peak usage design condition.
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