Sewer line backed up in master bathroom. Went into crawlspace and found 2 clean outs. Gave customer estimate to clear sewer line. Customer approved estimate. When pulling cleanout there was a softball size glob of grease. The 4” line exiting the home is imbedded with grease on walls. Also found 20 foot belly in crawlspace before it exists the home. Gave customer estimate he wants to see if clearing the line works first. System is draining but has a belly and line has a lot of grease all on it.