Well, the title prtetty much says it all. Found out, after the Tile man replaced the 18 " tile around the THE EXISTING valve body of the Delta KNOB [drew a circle and cut it out] that the new Price Pfister shower lever requires another VALVE BODY[?] From what I am told the only thing that can be done is to take the tile out so we can get to the valve assembly to change it to the PP valve assembly? ARE THERE ANY IDEAS OTHER THAN THIS