Commercial restaurant plumbing repair. Make repairs on 2” pvc drain and 1-1/4” copper drain that is split. Replaced 2x1-1/2 pvc tee in ceiling that was cracked along with installing clean out. Had to cut above tee and down stream of 2” pipe to make connection. This was for the mop sink Also had to cut out a 1-1/4” copper bar sink drain in the basement that drains into an open site drain. Was corroded coming through the floor, then 90 to horizontally. Cut out copper and replace it with PVC. All connections I made are good, but the rest of the copper line on the horizontal is corroded and needs to be replaced as well. This is further down the drain line that I worked on. Need to come back and replace a 10’ section of 1” PVC pipe with a 90 and 1” pnc no hub. Today, I replaced a 10’ section of 1” copper pipe that was deteriorating with holes with 1” PVC pipe and dropped it into the open site drain. The pipe was running horizontally and dropped into the open drain site.