Vents
Venting General Requirements
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P3101.2.1 |
Venting required at all trapped fixtures |
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P3101.2 |
Trap seal protection |
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P3101.3 P3103.4 |
Use Limitations No other purposes allowed-venting only |
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P3101.4 P3103.2 |
Freeze protection Frost enclosure |
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P3101.5 |
Flood resistance |
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P3102.1 |
At least one vent must terminate to the outside |
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P3102.2 |
Required outside vent must be dry |
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P3102.3 |
Minimum size of main vent |
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P3103.1 |
Minimum vent height from roof |
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P3103.5 |
Vent terminations around windows, doors and openings |
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Vent Connections and Grade
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P3104.1 |
Required exterior termination or air admittance valve |
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P3104.2 |
Installed to allow moisture to drain back into drain pipe |
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P3104.4 |
Vents must terminate 6 in. above highest trap |
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P3107 |
Common vent requirements |
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P3105 |
Fixture vent requirements |
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P3108.1 |
Wet Vent Requirements |
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P3109 |
Waste stack vent requirements |
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P3110 |
Circuit venting |
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P3111 |
Combination waste and vent systems |
Vent Pipe Sizing
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P3113.1 |
Vent size requirements |
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P3113.2 |
Developed length |
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P3113.3 |
Branch vents |
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P3113.4 |
Sump vents |
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P3113.4.1 |
Sewage pumps and sewage ejectors |
Island Sink Venting
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P3112.1 |
Limitations |
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P3112.2 |
Vent connection requirements |
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P3112.3 |
Vent installation below the fixture flood level rim |
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Air Admittance Valves
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P3114.1 |
General requirements |
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P3114.2 |
Installation |
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P3114.3 |
Only allowed if permitted by AHJ |
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P3114.4 |
Allowed locations |
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P3114.5 |
Access and source of air required |
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P3114.7 |
Can be used, as long as one outside vent exists |
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P3114.8 |
Prohibited use |
