Schedule 40 Gray Electrical conduit is required. Diameter of 6" is required for 9 products or less and 8" diameter for 10 and 12 product trunklines. All joints must be solvent cemented to guarantee a water tight chase. Only ONE 45 or 90 degree radius sweep bend may be used at each end of chase. Conduit must be sealed and capped during construction on both ends. Installer must trim exposed ends to four inches above finished floor during product line installation. After product lines are installed, open ends of the conduit must be capped and sealed watertight.