Talked to tenets about issues with toilet. (when toilet is flushed first time of the day no problems. if toilet is used within another 4 to 5 hours and/or toilet flushed more than more than once in combination of handwashing sink in the same bathroom water pipes begin to back up this is caused by two conditions restriction in pipe not allowing system to drain properly to a wet vent. or air vent for this sewer line is plugged. (possible causes of vent being plugged. vent going to roof is restricted due to possible material back flowing from previous restriction, plug in air vent and or stuff plug-in air vents from top birds, rats dropping stuff down air vent, leaves. Vent has been disconnected due to possible remodels that were done above disconnection sewer line from vent.) it is possible both issues are occurring at the same time due to information that I have gotten from tenets at first it could’ve just been a restriction in line but due to the current condition it appears the v