The General Pump 94821700 replaces a worn or broken spring inside pumps and chemical injectors. Compatible with EZ Series 44, U, UI, Manifolds, TT 51 Series, U, UI Manifolds, ET Series, TT Series 51, EBF pumps and ZROBO injectors. A genuine OEM part from General Pump. Ensures a proper fit and material compatibility when installed in the recommended models. Specifications: