That may have been my post. I used Unique Digest It. Their web site is
http://www.uniquemm.com/
I had very good success with their product. Another benefit was when I
bought the coach in January, shining a light down the toilet valve showed
only blackness. After the first use and drain the tank looked brand new a
light blue color.
Royce
> Hi all, I am looking for the name of a product mentioned on this
> dicsussion
> list not long ago...I'm thinking a month or so.
>
> The thread was about a difficult or sticky black tank valve. Someone had
> tried a certain product, let it sit for a week or two then their valve
> worked easier afterwards. Does anyone remember the product's name? I tried
> to search the archives without luck.
>
> Thanks!
> Scott Scheuermann