1-1/2″ to 1-3/4″ Inch Hose Barb Splice Coupler Repair Reducer Fitting Adapter Co by | Jul 5, 2026This fitting has a 1-1/2″ barb and a 1-3/4″ barb with a hose stop flange to keep the coupler centered in the splice connection. 1-1/2″ to 1-3/4″ O.D. Hose Barb Reducer Coupler. coupler centered in the splice connection.