How To Flush Toilet If Water Is Turned Off. If you have a random gallon of water on hand, it is possible to flush a toilet manually with very little effort. You will find it behind the toilet either on the wall or on the floor.
I’d recommend not to flush urine while there’s no running water because the tank. You can save this flush for an “emergency,” especially if you are only going to. Here are two ways to do it:
Remove the toilet tank lid.
Use a bucket of water (or two) to flush the toilet. Even when the water is turned off the tank should have water in it. Remove the toilet tank lid and place it in safe place. Follow the step by step process if your toilet has a valve for that: