The Speck Pumps Adapter for 21-80 Volute, 2-3/4" FPT x 3" FPT (2500223433), is a replacement adapter used in compatible Speck pump volute installations. This fitting helps connect or adapt threaded pump components where the specified female pipe thread sizes are required. It is a practical part for repairs, rebuilds, and equipment pad plumbing corrections involving the 21-80 pump series. Pump adapters must be properly matched to the equipment because connection size, thread style, and pump model all affect fit. Replacing a worn or damaged adapter can help restore a secure connection and reduce leak potential around the pump housing or plumbing interface. Confirm the pump series, volute configuration, and part number before installation. Replacement adapter for compatible Speck 21-80 volute applications Features 2-3/4-inch FPT x 3-inch FPT connection sizing Helps restore secure pump and plumbing connections Useful for pump rebuilds, repairs, or equipment pad updates Best verified by pump model and part number 2500223433