What to Do When You Discover a Water Leak at Home

Water damage is one of the most destructive and expensive problems a homeowner or landlord can face. A burst pipe or serious leak can cause thousands of pounds of damage in a matter of hours — soaking through floors, ceilings, walls, and damaging electrics along the way.

The difference between a manageable repair and a major disaster often comes down to how quickly and correctly you respond in the first few minutes. This guide walks you through exactly what to do.

The very first thing you should do is stop the flow of water. Do not wait to investigate the source — turn off the water first, then find out what happened.

Every property has a main stopcock (also called a stop valve) that controls the water supply to the entire building. You need to know where yours is before an emergency happens.

Common locations include:

• Under the kitchen sink
• In a utility room or cupboard
• Near the front door
• In the garage
• In the cellar or basement
• Outside in a pavement box (for the external supply)

Turn the stopcock clockwise to close it. If it has not been turned in years, it may be stiff — use a cloth for grip and apply steady pressure. Do not force it.

If you cannot locate or operate the internal stopcock, contact your water supplier immediately. They can shut off the supply at the external stop valve in the pavement. Keep your water supplier's emergency number saved in your phone.

Water and electricity are a dangerous combination. If the leak is near any electrical fittings — sockets, light fittings, consumer units, or appliances — turn off the electricity to that area at the fuse box before going near it.

If water is dripping from a ceiling light fitting, do not turn the light on or off. Go straight to the fuse box and isolate the circuit.

If you are unsure whether an area is safe, do not enter it. Call a professional.

Once the stopcock is off, open all the cold taps in the property to drain the remaining water from the pipes. This reduces the pressure in the system and minimises further leakage.

Flush the toilets once to empty the cisterns.

Do not open hot taps — leave the hot water system alone until a plumber has assessed the situation.

While you wait for a plumber, do what you can to limit the spread of water:

• Place buckets, bowls, or towels under the leak
• Use a mop or wet/dry vacuum to remove standing water
• Move furniture, rugs, and valuables away from the affected area
• If water is coming through a ceiling, carefully pierce the lowest point of the bulge with a screwdriver to allow it to drain in a controlled way — this prevents the ceiling from collapsing under the weight of accumulated water
• Open windows to begin drying out the space

Before you start cleaning up, take photographs and video of all the damage. This is essential for any insurance claim. Capture:

• The source of the leak (if visible)
• All areas of water damage — floors, walls, ceilings
• Any damaged belongings
• The water meter reading (useful for proving the volume of water lost)

Once the immediate situation is contained, call a qualified plumber. Do not attempt to repair burst pipes yourself unless you have the skills and tools to do so — a poor repair can fail again and cause further damage.

When you call, be ready to describe:

• Where the leak appears to be coming from
• Whether you have been able to turn off the water
• Whether there is any risk to electrics
• The approximate age of your property and pipework

At S Group Maintenance Services, we offer emergency call-outs across Hertfordshire, Essex, Cambridgeshire, Bedfordshire and London. Call us on 07703 377024 and we will get to you as quickly as possible.

Understanding what caused the leak helps prevent it happening again:

When temperatures drop below freezing, water in pipes can freeze and expand, causing the pipe to split. Pipes in unheated spaces — lofts, garages, under floors — are most at risk. Lagging (insulating) exposed pipes before winter is the best prevention.

Older properties often have copper or lead pipework that has corroded over time. If your property is more than 30 years old and has never had the pipework inspected, it is worth having a plumber take a look.

Pipe joints can work loose over time, particularly in areas subject to vibration or movement. A dripping joint under a sink or behind a washing machine can go unnoticed for months, causing slow but significant water damage.

Washing machines, dishwashers, and fridges with water dispensers all have supply hoses that can split or come loose. Check these hoses annually and replace them every five years as a precaution.

Excessively high water pressure puts stress on pipes and joints and can cause them to fail. A plumber can fit a pressure reducing valve if your pressure is too high.

Not all leaks are dramatic. Slow leaks can go undetected for months, causing hidden water damage that only becomes apparent when mould appears or a ceiling collapses. Watch out for:

• Unexplained increases in your water bill
• Damp patches on walls or ceilings with no obvious cause
• Peeling paint or wallpaper
• A musty smell in a room
• Soft or discoloured patches on wooden floors
• The sound of running water when all taps are off

If you suspect a hidden leak, a plumber can use specialist equipment to locate it without unnecessary damage to your property.

The best way to deal with a water leak is to prevent it from happening in the first place:

• Know where your stopcock is — and make sure everyone in the household knows too
• Insulate exposed pipes before winter
• Check appliance hoses annually
• Have your pipework inspected if your property is older or has never been checked
• Act on slow drainage or dripping taps immediately — they are often early warning signs of a bigger problem

A small investment in preventative maintenance is always cheaper than emergency repairs and water damage restoration.

If you have discovered a leak or want a plumber to inspect your property's pipework, contact S Group Maintenance Services today. We cover Hertfordshire, Essex, Cambridgeshire, Bedfordshire and London.