Ill respond to everyone that responded to my original post.

Rick, you maybe on to something. The house has been vacant for a while. It was a foreclosure (seems I have been doing a lot of them lately). Do you think there is an easy way to clean it out?

Dom, Im curious about your statement regarding the flow reducing devices. Seems odd IRC requires 4 gpm, but you could have a flow reducing device to get it to 2 gpm.

Nick, I cant remember ever seeing a shut off valve in Houston on bath tubs. Typically they don't even put access panels behind the tubs/showers.