Plumbing-Vent-Model.pdf

This is a technical drawing specification document for plumbing vent flashing installation, applicable to state and local construction projects. The document provides detailed specifications for soft metal flashings used in plumbing vent stack applications on built-up roofing systems. Sheet lead flashings must meet a minimum weight of 4 pounds per square foot, while sheet copper flashings must be minimum 16 ounces. The specification requires that copper flashing installed over iron or steel pipes be wrapped with asphalt-coated roofing felt to prevent galvanic corrosion between dissimilar metals. For plumbing vents with diameters less than 2 inches, soft metal caps rolled 1 inch down into the pipe are required. The flange assembly must be set in specified mastic with a minimum 4-inch flange, and the installation includes two target plies adhered to the specified built-up roofing membrane over specified insulation and roof deck materials.

The drawing specification addresses technical installation requirements for plumbing vent penetrations through built-up roofing systems, emphasizing material compatibility and proper sealing methods. The specification includes provisions for both hot and cold plumbing vent applications with detailed dimensional requirements and material selections designed to ensure weathertight performance and prevent water infiltration at roof penetrations. No pricing, contract terms, award dates, or bidding procedures are contained within this technical specification document.