Simple Pump’s own cap for 6” and 6.25" casings. Four ports: 1-3/4" for the Simple Pump with split flange, 1.7" smooth-walled port with a slight taper having a press-fit plug for submersible, (2)-1" FNPT with threaded PVC plugs, one for wiring, one for shock.
CNC machined from a solid billet of metal.