KINGSTON KITCHEN & BATH INSTALLATION INSTRUCTIONS Tub Spout This tub spout is designed for installation on a 1/2" (5/8" 0.D.) copper pipe stub out. Installation Instruction: 1. Prepare a 1/2" copper stub out to protrude from the wall to debugger end of the stub out and apply a light coating of petroleum jelly or similar. 2. Apply a small bead of silicone around the back of the spout. Smoothly press spout onto the stub-out until fully inserted .