It's always nice to hear of a positive experience, and this one strikes home with perfect timing.

I also have a relatively new American Standard low flow porcelain round seat toilet, and guess what? It has an enlarging spot in the dependent bottom front of the water reservoir. As yourself, I cleaned and tried appropriate toilet bowl products without resolution. So puzzled, with gloves on and clear water in the bowl, I reached in to find the porcelain has is interrupted (gone) on the front side at the bowl bottom. In it's place is a big brown spot that is very obvious and cosmetically displeasing.

Do you mind sharing your contact with me? I suspect American Standard might like to see a photo of mine also, don't you? I hope they will help as I am at wits end here.

Thank you very much for your post and help.

-SW

I used their website. This page,
http://www.americanstandard-us.com/contactUs.aspx#custForm
The Contact Customer Service Online link.
Hope you get as good a response as I did. I suspect they want to know if they have a bad batch of porcelain.

Here is a link that might be useful: http://www.americanstandard-us.com/contactUs.aspx#custForm

Thanks kathy. I'll send them a photo with their American Standard stamp. So curious a similarity...

Sounds like the glaze failed on the bowl, and the dark spot is moisture spreading through the porcelain. Good to hear a positive resolution for OP, hopefully for Sparkling too.

American Standard said my toilet warranty was for only one year. Hmm, when replaced I'll have to think about the warranty more.

Glad you got relief though kathy77.