3/8" Union Tee
A 3/8" Union Tee fitting is typically used to split long distribution line that feeds a standard 1/4" nozzle circuit a significant distance away.
NOTE: 3/8" Union Tees are NOT used in typical nozzle circuits. 1/4" tubing has a roughly 3/8" outside diameter. Don't order these fittings for a normal nozzle run!