: I installed an old American Standard 13 litre toilet in my rennovated basement bathroom, and found that there are 4 bolt holes in the base. Of course, only 2 line up with the new flange.

: I have noted installations of similar toilets, and see that they indeed have 4 bolts installed. Were the front two just for additional stability and to reduce possible twisting stress on the flange? I only used the rear bolts with the flange.

: I'm going to replace the toilet soon with a low volume model, but am curious none the less. It seems to work fine and is quite sturdy with just the 2 bolts.

With caulking from bolt to bolt, around the front, it should work just fine. Terry