For awhile now my hall restroom toilet when flushing will either go down slowly, water will drain but nothing else, or just all together get clogged. I plunge over n over until it finally flushes and again within days same problem persists. Finally it clogged again so I thought. I plunged and water slowly went down. Meanwhile until maintenance comes to check out problem toilet IS NOT in use. Last night & today I’ve woken up to a restroom completely flooded. With the toilet bowl overflowing with water. 1st thought shut the valve off. Done, cleaned up mess emptied bowl completely and left it alone. Again woke up to a restroom completely flooded and bowl overflowing. Why is water steadily rising up into my toilet bowl? How? Where could this all be coming from? Please I need answers / assistance. Help!!!!

For a while now my hall restroom toilet when flushing will either go down slowly, water will drain but nothing else, or just all together get clogged. I plunge over and over until it finally flushes and again within days same problem persists. Finally it clogged again so I thought. I plunged and water slowly went down. Meanwhile until maintenance comes to check out problem toilet IS NOT in use. 

Last night & today I’ve woken up to a restroom completely flooded. With the toilet bowl overflowing with water. 1st thought shut the valve off - done. I cleaned up the mess, emptied the bowl completely and left it alone. Again woke up to a restroom completely flooded and bowl overflowing.

• Why is water steadily rising up into my toilet bowl?
• Where could this all be coming from?