How to Install a Frost-Free Hose Bib

Faucets are often the weakest point in a home's plumbing during a deep freeze. A standard spigot holds water right up against the exterior wall, which turns into an ice plug the moment the temperature drops. By installing a frost-free hose bib, you extend the valve stem deep into your basement or crawlspace, moving the actual water seal into a warm area where freezing is impossible. Successfully installing one requires a bit of patience under the house or behind an access panel, but the peace of mind is worth every second. When done well, you gain a reliable, winter-proof outdoor water source that won't leave you dealing with a flooded basement come springtime. Just ensure the spigot maintains a slight downward pitch to the outside, allowing any residual water in the extended pipe to drain out completely after you turn it off.

1. Cut Off Water Supply. Locate the main water shut-off valve for the house or the specific branch line feeding the outdoor faucet. Open the current exterior faucet to drain all remaining pressure from the lines before you begin cutting.
2. Extract Old Faucet. Using a pipe wrench and a backup wrench on the pipe fitting, carefully unscrew the existing hose bib from the supply line. If it is soldered to copper pipe, you will need to cut the pipe using a tubing cutter, leaving enough room to work with the remaining line.
3. Size Copper Line Precisely. Measure the length of your new frost-free unit and compare it to your current pipe setup. Cut the copper supply line to the appropriate length using a tube cutter to ensure a square, clean edge for the new fitting.
4. Clean and Flux Joints. Clean the end of the copper pipe with a wire brush or emery cloth until it shines bright. Apply a small amount of flux to the outside of the pipe and the inside of the new valve's solder fitting.
5. Solder New Frost-Free Bib. Slide the new frost-free bib into the hole and connect it to the copper line. If you are using a push-to-connect fitting, push firmly until you feel a click; if soldering, use a propane torch to heat the joint and flow the solder into the seam.
6. Mount and Weatherseal Flange. Screw the flange of the new hose bib into the exterior wall using stainless steel screws. Apply a bead of exterior-grade silicone caulk around the perimeter of the flange to prevent water from seeping into the siding.
7. Verify Zero Leaks. Turn your water supply back on slowly and inspect the connection point inside the house for any moisture. Leave the outdoor faucet closed and watch the joint for several minutes to ensure a perfect, dry seal.