Came to restaurant to f/u on yesterday.
Maintenance came in and snaked drain last night. Ran water full blast in 3-compt sink and mop sink, and no water was backing up in drain. Went about 40 feet to get to clog.
Walmart plumber James came and is cleaning up piping below sink to make it more accessible for cleaning. There was a lot of piping circling around to air gap making that difficult.
When work done, clean drain with brush and soap and poor chlorox down drain as there is still an odor.
Whenever wastewater backs up, need to close immediately and have corrected.
