My American Standard Toliet has a hole in the back of the base which is leaking water. I went and looked at Home Depot and all the toliets of this model have this hole. What is it for and why does mine have water coming out after I flush?
When they "fire" clay products, such as a toilet, any closed spaces have to have vents or the air inside would expand and create a "bulge" in the finished product. That is the reason for the hole. The reason water is comng out of it is that the toilet is defective.