Replace a Hose Bib with a Frost Proof Hose Bib Part 2

What You'll Need
New Frost-proof hose bib
Threaded union fittings
Joint compound
Insulating tape

In the first part of this guide to replacing a hose bib, you learned how to remove the old pipe, and take away any connections which might not be needed by the new frost proof pipe. In the second part of this guide, you will now learn how to install this new bib, which will be protected from frost. These new faucet bibs are designed to be much less complicated than their metal counterparts, and you should be able to complete this project in a matter of hours.

Step 1 - Adding the Union Joint

As you have removed the hose bib from a metal pipe, you will need to install a union fitting before you attach the new hose bib. This will prevent corrosion and galvanization from forming between touching metal pipes. It is also preferable to use these fittings when adding a  hose bib, rather than trying to weld, as the latter should only be done by professionals. Welding by amateurs may break frost-proofing seals. Take the union fitting, and cover it with a little joint compound. Position it over the end of the cut pipe, and then use your wrench to tighten it into a suitable position. Check that it is completely tight before proceeding.

Step 2 - Add the Frost-proof hose bib

Take up the hose bib, and insert it into the union fitting. You should have a small plastic connection on the inner side of the bib. This connection is there to ensure that the bib tilts forward slightly, so that water runs out of the pipes, and is not left to freeze in them. Push this connection into the union fitting, and tighten it. Ensure that all of the fittings are tightly placed.

Step 3 - Add Insulation Tape

When you have connected the hose bib, run some insulating tape around the edge of the faucet, paying particular attention to the area where it intersects with the concrete. This insulating tape is designed to reduce the amount of corrosion and damage caused by the acid in the concrete. It also prevents rubbing between the concrete and the faucet, which can damage both.

Step 4 - Mistakes to Avoid

One of the most common errors people make in this process is to try and weld the ordinary pipe and the frost-proof hose bib together. This is not a good idea, as the hose bib holds a number of rubber seals which could be melted by the soldering iron. Unless you are a professional plumber, you will not be able to keep the frost-proof hose bib water tight by welding it. Choose to use an ordinary connection fitting instead. Another mistake is to try and unscrew the faucet from the outside, without removing the pipes from under the house. This will cause the pipes to twist, which could lead to water damage in your crawl space.