Cast iron leaking upon arrival. Customer stated her husband found a leak in the kitchen sink drain line. After going in crawlspace found cast iron Y leaking. Informed customer we could cut out the bad section and replace it with pvc. Gave customer estimate, customer approved estimate. Cut out bad section of cast iron and replaced it with new 2 inch pvc. Informed customer we cleaned as much grease out of the cast iron line as we could. Ran sink for 10 minutes and line was flowing properly with no leaks. Drain line is working properly and no leaks upon departure