Other then drilling a hole on the top cap of a durso pipe for overflo, do you nned to drill any other holes. the aga durso pipe has also three holes drilled on each side of the tee. so it's a male adaptor screw to bulkhead in overflo then pvc pipe to tee to pvc to cap, on vertical side of tee theres a pvc connecting 90 elbow then a small pvcwillpost pics, anyone have pics to follow