Pride Plumbing was called out for a main line stoppage - the floor drains were backing up in the restrooms. Upon arrival, we opened up the manholes for the hair trap and after inspection we decided it needed to be pumped. While the pump truck was on its way, we ran a water pressure jetter device in every accessible cleanout. After that, we pumped out the sewage tanks and the sewer pump. Then, things were still backed up, so we pulled the sewage pump and found that its check valve was packed full of hair. We cut out and replaced the check valve and tested the pump for proper working order with no further issues.