Prevent Frozen Pipes: The Simple Outdoor Tap Check Before Winter

On the first frosty morning, the same scene plays out in many homes: an outdoor tap produces no water, a pipe makes an unusual noise, then a small puddle appears by a wall. At first, it seems like a minor issue or an ageing, temperamental system. A few hours later, the pipe may have cracked somewhere out of sight, behind plasterboard or beneath a patio. An emergency plumber arrives, takes things apart, investigates and repairs the fault… and the bill can quickly approach €500. Yet one very simple task, carried out before the first cold nights, greatly reduces this risk. It needs neither specialist equipment nor particular DIY skills. You simply need to remember it at the right time. And that time is now.

Frost does not always burst pipes when you expect it to

We all know that November evening when the cold 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 pipes is that they do not respond only to the sub-zero temperature shown on a weather app. A pipe exposed to wind, running through a crawl space or positioned against a north-facing wall can freeze before the rest of the house does. As trapped water turns to ice, it expands and can place formidable pressure on copper, PVC or the most vulnerable joints.

The catch is that a leak does not necessarily show itself during the freezing night. For Marc, near Limoges, the garage tap stopped running in January; he paid no attention, assuming it was simply blocked. Three days after temperatures rose again, a hidden crack in one section of pipe allowed water to escape behind a partition wall. The quotation exceeded €480 for the emergency call-out, leak detection and repair, excluding the repainting still required. Damage is often revealed during the thaw, when water pressure returns to an already weakened pipe.

Second homes, unheated garages and older properties are particularly at risk, although no one is entirely protected. A water supply in a utility room, a forgotten outdoor shower or a garden tap can be enough to cause a problem. Freezing weather does not need to last for a fortnight: a few hours below zero can cause damage when water remains still in an exposed section. A pipe 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.

Outdoor taps: the essential step of shutting off, draining and leaving them open

Before prolonged frosts begin, find the isolating valve supplying every outdoor water point. It is often located in the garage, cellar, utility room or beneath a sink. Close it, then open the outdoor tap to drain the remaining water from that section of pipe. Leave the tap open throughout winter, with no hosepipe attached. This quick draining step prevents water from being trapped in the pipe and becoming an ice blockage. Allow five minutes, or sometimes less, for a task that protects an area commonly forgotten until it causes trouble.

Many people correctly turn off the outdoor tap supply, but stop there. It is understandable: the action seems logical, the garden has been put away and the evenings are drawing in. However, shutting off the supply without draining the system leaves water trapped between the indoor valve and the external tap. Let us be honest: nobody really does this every day, and it is easy to postpone the check until the following week. Another common mistake is leaving a hosepipe connected; it retains moisture, makes draining harder and puts strain on the tap when it freezes. Disconnect it, empty it and store it under cover.

For exposed pipes in a cold cellar, garage or accessible crawl space, fit insulating foam suitable for the pipe diameter, paying particular attention to bends and joints. It is not a miracle solution during an extreme cold spell, but it significantly slows heat loss and reduces vulnerable areas. Also check corners where air circulates poorly: an ajar garage door or a broken vent can be enough to make the temperature around a water supply fall sharply.

“An empty pipe cannot freeze from the inside: this simple rule prevents many emergency call-outs.”

• Close the isolating valve for outdoor taps.
• Open the outdoor tap to drain any remaining water.
• Remove the hosepipe, quick connectors and spray guns.
• Fit insulation around pipes exposed to the cold.

When temperatures fall: small precautions that prevent the worst

Once the outdoor system has been drained, consider rooms that are rarely used. In a laundry room, attached garage or a home left empty for several days, maintain 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 thin trickle of water to run from a vulnerable tap can also reduce the risk of freezing, provided it does not become a wasteful habit throughout the winter. The right measure depends on the property's actual layout.

If a tap no longer runs, or water pressure suddenly drops after a very cold night, never use a naked flame, blowtorch or boiling water on a suspected frozen pipe. Excessively rapid heating can worsen a crack, distort certain materials or cause an accident in a cluttered area. Choose gentle warming instead: heat the room, use a hairdryer from 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 begins escaping again.

A €500 plumbing bill is never just an entry on a bank statement: it often comes with stress, a disrupted working day and sometimes a damp wall that needs repairing. Checking taps before winter may appear insignificant alongside everything else to do, from clearing fallen leaves to switching the heating back on. Yet these modest actions are exactly what make a 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 sometimes spread more effectively than an emergency quotation.

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