Found water being held from build up in pipe from stack behind bathroom in storage room to main clean out, but before floor drain in utility room no backup seen, backing up into shower drain. Ran large machine out to clear, ran camera saw build up on black iron pipe 15-22’, ran 3” offset bit out out to 24’, then 3” c bit out to 50’, ran camera out to 60’, looks good. Ran water hose from water heater to help flush out debris, showed customer rusty pipe, and build up now removed but needing more flushing and water use to get out of pipes.