Performed camera inspection of customers sewer main specifically back right bathroom. Noticed customer drain was holding significant water with solids holding in drain. Crawled the crawl space to visually inspect drains for this bathroom and saw that a large portion of the 40’ run was backgraded with several fittings for the shower and sink installed with in proper fall as well. Recommend removal of this section of ABS and re plumbing with proper grade to avoid future issues.