1"x3/4" Urinal Spud. The Gerber 99-275 Urinal Spud is a plumbing component used in urinals. It measures 1" x 3/4" and is designed to connect the urinal to the water supply. The spud ensures proper water flow and helps maintain the functionality of the urinal system. If you need to replace or install a urinal spud, the Gerber 99-275 is a reliable choice.