36. Plumbing 1 Lavatory -Waste piping is usually 1 ½â- 2â in diameter Water closet -Drain piping is at least 3 inches in diameter
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40. Radiant Barrier A reflective foil placed adjacent to an airspace in roof or wall assemblies as a deterrent to the passage of infrared energy. It is reflecting the exterior heat back out and keeps the interior heat within. ***This is next to impossible to find installed so please cut me some slack. Thank you