PVC White Reducer Bushing - 1-1/2" Spigot x 1" FPT
1-1/2" Spigot x 1" Female Pipe Thread
1-1/2" Spigot is the same dimensions as pipe with 1-1/2" inside dimension and is designed to fit inside a 1-1/2" slip fitting. 1" FPT will thread onto 1" MPT fittings