Reader Feedback: This is a GREAT tip, as I used a very old method which was to place some BRICKS in the tank.
This had the SAME effect, however the bricks were the cheap "concrete block" kind and small pieces came off, and over the years flushed down and sufficiently plugged the outlet jets, that my water volume able to get to the bowl -- no mater how much water in the tank -- prevented a flush.
As a result, I had to buy a new toilet, and since I was, I found a sale and bought a wonderful Kohler dual-flush toilet, which uses 1 Gal. per "little" flush, and 1.6 Gal. per full flush. I am very happy with it. WardXmodem (talk) 09:19, 4 December 2013 (PST)