My tub and shower faucet is leaking. The valve is located deep in the brass pipe extending from the main body of the faucet; the valve is plastic and has a plastic extender to allow the knob to be attached. I cannot remove the valve to replace it. How to fix?

Do you want to repair or replace? Both the tub drain and the faucet is leaking? If you wish to repair the faucet I'll need the brand name and as lot more information. Back to you, Tom

Do you want to repair or replace? Both the tub drain and the faucet is leaking? If you wish to repair the faucet I'll need the brand name and as lot more information. Back to you, Tom