Grooved pipe fittings connect with pipe to deliver air, water, oil, and natural gas in wet and dry systems, sprinkler risers, pipe feeds, air or water fire service lines, and pipe systems subject to excessive vibration. Grooved pipe fittings connect with grooved pipe to change direction, add outlets, reduce outlets, or cap piping systems. These full-flow fittings work with grooved pipe to settle into the grooves for a secure connection. Grooved stainless steel pipe fittings come in a variety of sizes and shapes.