Wastewater adapters - he-ruide
Before you bore a hole in your PUP you should pracitce on a peice of wood.  Bore a hole and insert the 1 1/4 inch nipple. Screw the 1 1/4 electrical conduit locknuts on either end of the nipple and tighten so that the nipple can not turn.

Before you bore a hole in your PUP you should pracitce on a peice of wood. Bore a hole and insert the 1 1/4 inch nipple. Screw the 1 1/4 electrical conduit locknuts on either end of the nipple and tighten so that the nipple can not turn.