Three-inch or four-inch PVC exhaust air and combustion air piping penetrates a roof assembly supported by roof trusses. The penetration is sealed watertight with a pipe flashing curb and a single ply roof jack furnished and installed by the roofing contractor. A 3'-0" dimension establishes the vertical clearance of the vent termination above the roof surface.
ROOF BY OTHERS FLASH WATERTIGHT PIPE FLAHSING CURB 3'-0" ROOF TRUSS, REFER TO STRUCTURAL DRAWINGS 3"/4" PVC EXHAUST AIR (SEE PLANS) SINGLE PLY ROOF JACK FUNISHED AND INSTALLED BY ROOFING CONTRACTOR. SEAL WATERTIGHT TO PVC VENT. 3"/4" PVC COMBUSTION AIR (SEE PLANS) M601 3 CONCENTRIC VENT PIPING DETAIL
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