Replace 3 older toilets Clear 2nd floor bathroom sink Customer called us out cause they were experiencing intermittent blockages in 2nd floor master and hallway toilet. Upon arrival we noticed toilets were a bit old. We tested bathroom groups for a mainline issue. After running water for a long period of time, only the toilets were being affected. I tested main floor bathroom group to ensure it had proper flow. We noticed the 2nd floor hallway bathroom sink was experiencing a blockage causing slow drain. We replaced both 2nd floor toilets and restored proper flow in sink drain. We tested for leaks and were successful.