3/8" x 1/4" galvanized reducing coupling.
NDS Pro-Span Coupling
Oatey® Level-Fit Closet Flange Plastic Ring
Pipe Reducer Bushing, Spigot x Female Thread, White, 1.25 x 3/4-In.
Charlotte Pipe 3/4 In. Solvent Weldable CPVC Coupling with Stop
Charlotte Pipe 1/2 In. Schedule 40 PVC Tee