439-131
Spears 439-131 | 1X3/4 PVC Reducing Bushing MPTXFPT SCH40
A nice touch on the P4510 is the recessed switch that prevents accidental starts.
Charlotte 439-131 PVC Reducer Bushing MPT x FPT 1 x 3/4
This grease holds up well in high-speed bearings without overheating.