Stenner Duckbill [Injection Check Valve Santoprene Qty 2] is a genuine Stenner Pumps replacement part designed to restore proper check valve sealing and reduce unwanted backflow in chemical feed lines. Chemical feeder systems depend on small connection, valve, and drive components working correctly, and replacing worn parts with the correct Stenner part number helps maintain consistent dosing and dependable system performance.Use part number UCCVDB0 when matching this item to an existing Stenner pump, injection check valve, tubing connection, or feeder assembly. It is a practical choice for service technicians, facility maintenance teams, and pool or spa owners who need to keep automated chemical delivery equipment in working order without replacing a larger assembly unnecessarily. Santoprene duckbill design supports reliable injection check valve performance Helps maintain one-way chemical flow in compatible Stenner systems Ideal for replacing worn valve internals during routine feeder service Available in the listed package quantity for convenient maintenance Useful for pool, spa, and water treatment chemical automation repairs