Plumbing · A-VGB22

Exhaust Stack and Sub-Slab Venting Pipe Riser Transition

Materials

Elements

Skylights Stairs Roofs Floors / Slabs Connections / Plates

About this detail

A four-inch diameter solid Schedule 40 polyvinyl chloride pipe transitions to a four-inch diameter cast iron pipe riser using a coupling transfer located at the concrete slab. The riser extends upward into the building interior toward the roof, while the horizontal polyvinyl chloride run connects to the sub-slab venting system network. Shop drawings must be submitted for riser routing through each building roof including stack offset layouts. Locations of exhaust riser pipes require coordination with the architect and mechanical engineer to confirm appropriate setbacks from heating, ventilation, and air conditioning equipment, building intakes, and skylights.

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