Dear Brian, Please visit our website at http://www.tileredi.com. This could be the solution to your shower problems. For a information package complete with installation instructions, please do not hesitate to contact us via e-mail. Sincerely yours, Tile Redi: I need to replace the fibergalss combination shower/tub in the master bath. I would rather build a custom shower only. A friend told me that for a shower only the drain needs to be 2 inner diamter pipe. Is this true? I think the whole house only has 1.5 pipes. Is this something I need a permit for?: thanks for any advice : brian