A hose bib is the outdoor faucet attached to your home that allows you to connect a garden hose for watering, washing, or filling outdoor equipment. Depending on the setup, it may also be called a sillcock or a wall hydrant. While simple in design, this fixture plays an important role in your plumbing system by safely controlling water flow to the exterior of your house. Because it’s exposed to the elements year-round, it’s also more likely to wear down or leak over time.