There might be a line on the toilet tank that identifies the ideal water line. Make reference of this point so you know where you'll want your float to sit after the adjustment. 2.

Disconnect the flexible water supply line from the base of the toilet tank. Remove the nuts from the toilet bolts. You’re now ready to lift the toilet up off the floor.

Shutting off your toilet water supply is easy once you locate the appropriate shut-off valve at your house. 1. Turn off the Shut-Off Valve Behind the Toilet.