Looking for some advice if I can fix my tub spout from leaking when the shower is on or if I need to replace it. Plumbing is not my area at all. That said, with some help I think I can handle this project. I have a typical tub with shower. The shower handle turns counter clockwise for cold and as I continue to turn it gets hot. There is a lever below the handle that I move from left to right to transition from the tub spout to shower. When I do this to use the shower water still comes out of the tub spout. Can anyone tell me how to fix this or do I need to replace it? Thank you in advance.