H, 1/29/2006,4:52:22 PM, wrote:

Any chance it's an older 1.6gpf toilet? those are notorious for
doing what you describe. I had a houseful of them, and if they only
stopped up 2-3 times a month, I would've been thrilled.

If that's the problem, you may want to invest in a newer 1.6gpf
toilet with a larger drain. I now have two of those, and they rarely
clog.

It is a Mansfield from June 1990. It has plenty of water.