The problem is directly traceable to attitude of the company
that manufactured the product. Better to buy a new toilet.
Consumer Reports laid this out. Even less expensive European
brands worked better than so many 'top of the line' (most
expensive) American Standard products. Rather than engineer a
quality product, some companies will instead cost control it.
Price had no relationship to which brands performed better.
Manufacturer's reputation for that product line will report
more useful information. Did they engineer it or cost control
it?

A previous poster who removed his American Standard
product. Found no glazing in sections that you cannot see.
That raspy surface only made the flushing even worse.
American Standard - their designs being the problem. But
don't take my word for it. Get Consumer Reports. I believe
it is the May 1998 issue.

Why do some work and others not? Also the size of sewer
pipes will have adverse effects. A larger pipe can cause
additional problems. But it should not. The toilet itself
should have been properly manufactured.

Eric and Megan Swope wrote:
Hi everyone. An American Standard toilet in our powder room does
not flush with great force. Sometimes remnants remain and require
an extra flush. The other 2 toilets in our house are exactly the
same, but flush with greater force. Is there anyway to increase
the force with which a toilet flushes?
Can I buy a different flush valve?

I have tried increasing the water level in the tank, no good. I
have cleaned out the little holes inside the edge of the bowl, no
good.

Thanks for any help/suggestions.