This Hypro Remote Control unit works with the following pumps: Hypro D70, D115, D135 and D160 pumps. The Remote Control Unit features a built in relief valve, and 1" hose barb inlet. The following hose barb outlets can be interchanged onto individual shut-off valves: Three 3/8" hose barb outlets; three 1/2" hose barb outlets; and three 3/4" hose barb outlets.