This part is a Nut to fit a Waterway Hi-Flo Suction Return Wall fitting with a 2 1/2" Hole Size and a 1 1/2" Slip plumbing fitting..
See a link below for that Suction fitting this nut...
Waterway Hi-Flo Wet EndSide discharge, 2"mbt suction/discharge, 48 frame wet end for the Waterway Hi-Flo pump. This wet end is used with a 1.0hp, 48 frame, thru-bolt style motor. The motor used may...
Waterway Hi-Flo Wet EndSide discharge, 2"mbt suction/discharge, 48 frame wet end for the Waterway Hi-Flo pump. This wet end is used with a 1.5hp, 48 frame, thru-bolt style motor. The motor used may...