My hot water handle leaks when I turned the shower on... it doesn't leak normally when running a bath or when it is turned off... it's a relatively new setup.. not sure what trype it is...

Kissler & Co., Inc. (http://www.kissler.com/)
Please tell us which brand. Look at the handle section.

It is American Standard...

Which one? 3 handle or 2 handle or single handle?

Three handle