If something is blocking the water that's supposed to be coming from your faucet or it's reducing the pressure of your water flow and clogging the screen, you may have a buildup of sediment in your plumbing, particularly if you draw water from a private well or from a municipal source that has suffered a main break. Clearing out those deposits and restoring your faucet's flow is relatively easy to do.
Removing Sediment From a Faucet
Turn off the main water supply, which is usually located in your garage, basement or outside the house. Turn the handle in line with the pipe to turn off the supply of water. Turn off the water supply to the faucet by turning the handles underneath the sink counterclockwise. Turn on the faucet to release the pressure in the lines.
Remove the aerator—the tip of the faucet where the water comes out—with a rubber-tipped adjustable wrench. Pay attention to how the parts come out. There will be a washer or two and a screen. Soak them all in vinegar for one hour, rinse and set aside.
Place a bucket beneath the sink to catch any water. Remove the water lines to the faucet handles. Use an adjustable wrench to unscrew the nut at the top of the lines that lead into the handles.
Remove the end attachment to the air compressor by unscrewing it in a counterclockwise direction. Push the hose into the end of the faucet where water comes out. Use duct tape to seal the compressor to the sink. Wrap the duct tape around the faucet and the hose approximately 10 times.
Turn the compressor to the lowest pressure setting. Turn on the compressor and squeeze the handle. This should clear any blockage in the faucet. Let the compressor run.
Place your hand over the opening under the sink where you removed the water lines. If you feel a constant flow of air, the sediment blockage has been removed. If not, turn the pressure up to medium on the compressor and repeat from Step 5.
Attach the water lines back to the faucet handles and tighten them down with the adjustable wrench. Remove the duct tape from the faucet and compressor. Turn the main water supply and the faucet water supply back on. Let it run for five minutes, then reattach the washers and screen to the faucet. Screw on the cover and tighten down with the rubber-tipped adjustable wrench.