Champion Flush Valve Seal Leaking 6-18-06
I just wanted to add my experience to the ever growing list. I purchased my Champion "Williamsburg" from Home Depot based on the advertised flushing ability. I had it professionally installed by a plumber who I use regularly and he felt that AS had a good reputation - though I imagine that was based on their other toilets. Anyway, about a year after installation with relatively minor problems (ie, flash valve not seating properly), we got the leaking issue referred to here in many posts.
Essentially, when the toilet is not in use, it leaks from the tank into the bowl causing the need to refill. I tried to reseat the existing flash valve seal several times to no avail. I was unable to replace it due to the fact that neither Lowe's nor Home Depot carry the parts (something my plumber did warn me about, but I figured by that after a year these parts would be more widely available

).
I called AS and let them know about the problem I was having. To their credit, I did get right through to customer service and she was very pleasant. What gives me cause for concern is that she didn't even hesitate before authorizing sending me new parts. Seems to indicate that they are used to getting these kinds of calls. The other unfortunate aspect is that they only ship fedex ground, meaning that I'll have to wait 7-12 days before getting the part.
Given the long list of problems, I'll give this fix one shot before I replace te toilet with the traditional flush system. Hate to take the loss on the $$, but life is too short for the aggravation...and with two kids I like having my own toilet!
As for the calls for a class action suit, count me in if one ever gets started. I made my e-mail available under my profile.
Update: After about 14 days, the parts arrrived from American Standard. They sent two sets of complete replacement parts. I choose to simply replace the seal. After the first week, all seems fine and I've not experienced any leaking from the tank to the bowl. While I'm happy with the fix, I'm troubled with A.S. First off, the part should not have failed so quickly. Second, the number of days I had to wait for the parts was unacceptable, and extremely frustrating to have a toilet down. I would have to say that I'm not so sure I would recommend this toilet to friends and family. At the very least, I would issue a strong caution!