House flooded with sewage, leaked through wall?

[Nathan Bentley]

Hey everyone, first post on Biggerpockets!  Excited to join the community!  Wish my first post could have been a more positive one, but oh well...

My listing has been on the MLS for two weeks now. Yesterday we got the septic sytem pumped and it resulted in the downstairs toilets flooding over with sewage. The downstairs carpet as well as some trimming & cabinets are ruined and will be replaced by the plumber's insurance.

However, the sewage seemed to seep through a wall and into an adjacent room.  Should I be concerned about the wall?