Prevent frozen pipes with this simple outside tap step before winter

On the first frosty morning, the same scene unfolds in many homes: an outside tap delivers no water, a pipe makes an odd noise, then a small puddle appears beside a wall. At first, it seems like a minor issue or a temperamental old installation. A few hours later, however, pipework may have cracked in an unseen spot, behind plasterboard or beneath a patio. An emergency plumber arrives, takes things apart, investigates and repairs the damage… and the bill can quickly approach €500. Yet one very simple action, taken before the first cold nights, greatly lowers this risk. It requires neither specialist equipment nor particular DIY skills. You simply need to remember it at the right time. And that time is now.

Frozen pipes do not always burst when you expect

We all know those November evenings when cold weather seems to arrive without warning: the windscreen turns white, garden plants droop slightly, and we tell ourselves we will deal with it tomorrow. The problem with pipework is that it does not respond solely to the sub-zero temperature shown on a weather app. A pipe exposed to wind, positioned in a crawl space or running along a north-facing wall can freeze before the rest of the house. As trapped water turns to ice, it expands and can place formidable pressure on copper, PVC or the weakest joints.

The catch is that a leak does not necessarily appear during the freezing night itself. For Marc, near Limoges, the garage tap stopped running in January; he took no notice, assuming it was merely blocked. Three days after the thaw, a concealed crack in one section of pipe allowed water to escape behind a partition wall. Once the emergency call-out, leak detection and repair were included, the estimate exceeded €480, not including the repainting required. The thaw often exposes the damage, when water pressure returns to pipework that has already been weakened.

Second homes, unheated garages and older properties are among the most exposed, but no household is entirely protected. A water supply in a utility room, a forgotten outdoor shower or a garden tap can be enough to cause trouble. Cold weather does not need to last for two weeks: a few hours below zero can cause damage when water remains still in an exposed section. Pipework is nothing remarkable until the day it turns a peaceful Sunday into a race against time. This is why prevention depends less on major work than on a well-timed seasonal habit.

The essential step: isolate, drain and leave the outside tap open

Before prolonged frosts begin, locate the isolation valve supplying every outdoor water point. It is often found in the garage, cellar, utility room or beneath a sink. Close it, then open the outside tap to drain any water left in that section of pipework. Leave the tap open throughout winter, with no garden hose attached. This quick draining process prevents water from being trapped inside the pipe and becoming an ice blockage. Allow five minutes, or sometimes less, for a task that protects an area often overlooked until it causes a problem.

Many people do close the outdoor tap, then stop there. That is understandable: it seems logical, the garden has been tidied away and the evenings are getting darker. However, closing the supply without draining the system leaves water trapped between the internal valve and the external tap. Let us be honest: nobody really does this every day, and it is easy to put the check off until the following week. Another common mistake is leaving a garden hose connected; it retains moisture, makes drainage harder and weakens the tap when it freezes. Disconnect it, empty it and store it somewhere sheltered.

For visible pipework in a cold cellar, garage or accessible crawl space, fit insulating pipe sleeves suited to the pipe diameter, paying particular attention to bends and joints. This is not a miracle solution during an Arctic cold spell, but it substantially slows heat loss and reduces vulnerable areas. Also watch enclosed spots where air circulates poorly: an ajar garage door or damaged vent can be enough to make the temperature around a water supply drop sharply.

“A pipe with no water in it cannot freeze from the inside: this simple rule prevents many emergency call-outs.”

• Close the isolation valve for outside taps.
• Open the outdoor tap to drain away residual water.
• Remove the garden hose, quick connectors and spray guns.
• Fit insulation protection to pipework exposed to cold.

When temperatures fall: small precautions that prevent the worst

Once the external system has been drained, consider rooms that are rarely used. In a utility room, an attached garage or a house left empty for several days, keep a sensible minimum temperature and open cupboard doors concealing pipes against a cold wall. This allows warm room air to circulate around the pipework. When a cold snap is forecast, allowing a sensitive tap to run at a slight trickle can also reduce the risk of freezing, provided it does not become a wasteful habit throughout the winter. The right approach depends on the home’s actual layout.

If a tap no longer runs, or water pressure suddenly drops after a very cold night, never use a flame, blowtorch or boiling water on suspected frozen pipework. Excessively sudden heat can worsen a crack, distort certain materials or cause an accident in a cluttered space. Instead, raise the temperature gradually: heat the room, use a hairdryer held at a distance, or wrap warm towels around the accessible section. Turn off the water supply if you spot a leak. Then monitor the thaw, as this is often when water starts escaping again.

A €500 plumber’s bill is never merely an item on a bank statement: it often brings stress, disrupts a working day and may leave a damp wall needing repair. Checking taps before winter may feel insignificant among everything else to do, from clearing leaves to switching the heating back on. Yet these modest actions are exactly what make the difference in a home. Mention them to an elderly neighbour, a relative who will be away for a long time or someone who has just moved in: good habits can sometimes spread more effectively than an emergency estimate.

Key point	Detail	Benefit for the reader
Drain outdoor taps	Close the internal supply, then open the outside tap	Prevents standing water from freezing in the exposed section
Remove the garden hose	Disconnect, empty and store accessories	Reduces the risk of freezing around the tap and connectors
Monitor cold areas	Garage, cellar, north-facing wall, crawl space, unoccupied home	Makes it possible to act before an expensive crack develops