Minnesota Legislature
Office of the Revisor of Statutes
Minnesota Administrative Rules
4715.2540 VENT GRADES AND CONNECTIONS.
Subpart 1.
Vent grade.
All vent and branch vent pipes shall be so graded and connected as to drain back to a soil or waste pipe by gravity.
Subp. 2.
Vertical rise.
Where vent pipes connect to a horizontal soil or waste pipe, the vent shall be taken off above the center line of the pipe. The vent pipe shall rise vertically, or at an angle not more than 45 degrees from the vertical, to a point at least six inches above flood-level rim of the fixture it is venting, before offsetting horizontally or before connecting to the branch vent.
Subp. 3.
Height above fixtures.
A connection between a vent pipe and a vent stack or stack-vent shall be made at least six inches above the flood-level rim of the highest fixture served by the vent. Horizontal vent pipes forming branch vents, relief vents, or loop vents shall be at least six inches above the flood-level rim of the highest fixture served.
History:
L 2007 c 140 art 6 s 15; art 13 s 4
Published Electronically:
May 14, 2012
Official Publication of the State of Minnesota
Revisor of Statutes