Over time, the hard water in our area leaves deposits in the moving parts of the plumbing. When our tub spout diverter clogs, I use WD-40 with its spray nozzle curved up the spout to the diverter ...

Q: I have a bathtub/shower combination, and when I pull the knob on top of the spout to start the shower, only a little water comes out of the shower head while most of it comes out of the tub spout.

♪♪ Kevin: On "Ask This Old House," our experts travel across the country to answer questions about your house. ♪♪ Today, when this tub spout is open, water pours out the shower head. Richard will ...