§ 153.352 B/3 and 4 m venting system outlets.
Current through Sep 25, 2026 · Read all of Part 153
A B/3 or 4 m venting system outlet must:
(a) Discharge vertically upwards; and
(b) Prevent precipitation from entering the vent system.
Current through Sep 25, 2026 · Read all of Part 153
A B/3 or 4 m venting system outlet must:
(a) Discharge vertically upwards; and
(b) Prevent precipitation from entering the vent system.
← § 153.351 Location of 4m vent discharges.§ 153.353 High velocity vents. →