ShowerheadCause: the showerhead has a screen inside that can get clogged by mineral deposit build-up.
Solution: remove showerhead, then remove the screen (figure A). Using a small toothbrush, clean the mineral deposits from the screen or use a cleaner specifically for removing mineral deposits.
Sink
Cause: mineral deposit build-up can clog the aerator.
Solution: remove the aerator by unscrewing it from the faucet. Using a small toothbrush, clean the mineral deposits from the screen (figure B) or use a cleaner specifically for removing mineral deposits.
Shut-off Valve
Cause: mineral deposit build-up can clog the valve.
Solution: Unscrew the stem from the valve (figure C), then clean out the valve using a small toothbrush.