Cut out old cast iron ptrap and install new pvc. Customer stated that once we left, they ran tub and tub started leaking. Returned and found that P-trap had a hole in it so went ahead and installed new PVC p trap and tested. During test found out now overflow was also leaking. Went ahead and installed new waste and overflow kit. Tested by filling tub multiple times in dropping and also for running about 10 minutes and no leaks were present at this time. Cleaned up work area.