Stenner Injection Fitting [Check Vlv 3/8"] is a genuine Stenner Pumps replacement part designed to maintain one-way chemical injection from the pump into the circulation plumbing. 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 CVIJ3/8 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. Helps prevent backflow into compatible Stenner chemical feed lines Supports consistent injection of sanitizer, acid, or treatment solution Available in the listed tubing size and package configuration Useful for repair, replacement, and scheduled feeder maintenance Designed for pool, spa, and water treatment systems using Stenner pumps