Winterizing Outdoor Taps Before the First Freeze

In Calgary, the shift from a warm autumn afternoon to a hard, killing frost can happen in a hurry. One day you are watering the last of the garden, and the next, the ground is frozen solid. There are a few fall chores that simply cannot be put off, and preparing your outdoor water taps, or hose bibs, for winter is high on that list. It is a simple task that is easy to forget, but the consequences of forgetting can be severe. Water left in a pipe that is exposed to freezing temperatures will expand with enough force to split a copper pipe wide open.

The Problem with a Frozen Hose Bib

When you see a burst pipe on TV, it is usually a dramatic spray of water. A frozen hose bib is more subtle. The damage happens quietly during a deep freeze in January, but you will not discover the problem until April or May. The split in the pipe almost always occurs inside the wall, between the outdoor faucet and the indoor shutoff valve. All winter, the pipe sits there, split open but frozen solid. Then, on the first warm day of spring, you decide to wash the car. You turn on the indoor valve, and water floods into the wall cavity, behind your drywall, soaking the insulation and wooden studs. I have seen the result on many inspections: a soft, damp wall in a basement, a patch of black mold, and a homeowner facing a very expensive repair job.

Finding Your Indoor Shutoff Valves

Every outdoor faucet should have a corresponding shutoff valve inside your home. The first step is to locate them. They are usually found in the basement or a crawlspace, often in the ceiling joists directly above the foundation wall. Look on the interior side of the wall where the outdoor tap is mounted. You are searching for a small valve on a pipe that leads toward the outside wall. The valve might have a small, round, or five-spoked handle, known as a gate valve, or it might have a single straight lever, which is a ball valve. If your basement is finished, these valves should be behind a small, square plastic or metal access panel. If you have trouble finding them, start at your main water meter and trace the cold water lines as they branch out through the basement. Most homes have at least two: one in the front and one in the back.

The Winterizing Process, Step by Step

Once you have located your indoor valves, the process is straightforward. It only takes a few minutes for each tap.

1. First, go outside and disconnect everything from your faucets. This means garden hoses, splitters, and any automatic watering timers. A hose left connected will trap water and prevent the pipe from draining, which can cause even a frost-free tap to burst. Drain the hoses and store them in the garage or shed.
2. Go inside and turn the indoor shutoff valve clockwise until it is fully closed. Do not force it, just turn it until it stops. This shuts off the water supply to the outdoor pipe.
3. Head back outside and open the outdoor faucet. A small amount of water will drain out. This is the water that was sitting in the pipe, and getting it out is the whole point of this exercise. Leave the outdoor faucet in the open position for the winter. This allows any remaining drops of water to expand and drip out if they freeze.
4. For the final step, go back to the indoor valve. Many have a small metal cap on the side called a bleeder valve. Place a small bowl or a rag under it and unscrew the cap. This drains the last bit of water trapped in the valve body itself. Once it stops dripping, screw the cap back on, just finger-tight.

A Note on Frost-Free Faucets

Many newer homes are built with frost-free hose bibs. These are designed differently. The actual valve that stops the water flow is located deep inside the wall, in the heated part of the house. When you turn the handle outside, a long stem operates that valve. This design allows the pipe to drain automatically every time you turn it off. However, they are only frost-free if you disconnect the hose. I once inspected a home with a brand new frost-free bib that had burst. The owner had left a spray nozzle attached all winter, which trapped water and broke the pipe just like a standard faucet. While you may not need to use the indoor shutoff for a frost-free faucet, it is still the safest practice. It provides a second layer of protection against a failure.

This little bit of autumn work is about prevention. It is one of those simple maintenance jobs that keeps your home in decent shape through the long winter. While you are in the garage getting things ready for the cold season, it is also a good time to make sure your garage door stays working for the deep freeze. Protecting your home from preventable damage is just smart ownership, especially in a housing market with its own dynamics. For those who follow market trends, the official source is the Calgary Real Estate Board housing statistics pages. If you ever try to turn an old indoor valve and it is seized or starts to leak, do not force it. That is a sign it needs to be replaced, and it is a quick job for a licensed plumber.