First Option Step 1 – Turn Off Water Supply. Shut off the water supply to the toilet and empty the tank by flushing. Step 2 – Dry the Inside. Step 3 – Apply Glue to Crack. Step 4 – Refill and Test. Step 1 – Turn Off Water Supply. Step 2 – Remove Old Toilet Bowl. Step 3 – Install New Toilet Bowl. Step 4 – Connect.