Drywall Framing System
Grommets snap easily into stud knockouts and are used to protect electrical wiring and plumbing lines from contacting metal. Grommets are commonly used in construction when metal conduit is not required by building code.
Install grommets in all stud knockouts where wiring and plumbing lines will be inserted. Use the Snap-In Bushing for 1-5/8" and 2-1/2" wall studs and the standard 2-piece grommet for all wall studs 3-1/2" and wider.
Install the Snap-In Bushing by pressing the bushing into the stud knockout. Make sure to engage the bushing lips to secure into place.
Install the standard 2-Piece Grommet by first opening the grommet as illustrated above. Insert one side of the grommet through the knockout. Snap the grommet together so it engages with the metal sandwiched between the two plastic sides.