A water leak can be as minor as a dripping kitchen tap or as significant as a burst heating pipe flooding an apartment or house. In either case, the first rule is the same: stop the water flow, then start containing the damage, and only then look for the cause. Quick and correct action reduces repair costs and prevents mould, moisture damage, and water spreading to neighbours.
In this guide, we'll cover the most common types of water leaks in flats and detached houses, teach you how to locate the main stopcock and water meter assembly, provide a step-by-step action plan, and advise when it's appropriate to act yourself and when to call an emergency plumber. All recommendations are based on ToruFix OÜ's daily call-outs in Tallinn and Harjumaa.
Water Leak Emergency – What to Do in the First 15 Minutes?
If you discover a water leak at home, there's no time to waste. The sequence of actions is as follows: shut off the water, cut power in dangerous areas, remove water, save items, and call a specialist. These five steps apply whether it's a leaking connection under the sink or an overflowing boiler.
If you don't know where the main stopcock is, start looking immediately – not when an emergency is already in progress. The main stopcock is usually located in the kitchen or bathroom near the water meter assembly, or in the basement or stairwell water meter assembly in apartment buildings. In a detached house, the main stopcock is often near the street connection or on the basement wall.
- Step 1. Close the main stopcock or the apartment's main shut-off valve
- Step 2. Turn off electricity in flooded areas
- Step 3. Remove water with buckets, towels, and wet vacuums
- Step 4. Lift furniture, carpets, and electronics to a higher level
- Step 5. Call an emergency plumber and take photos of the damage
How to Shut Off Water During a Water Leak Emergency
The location of the main stopcock depends on the type of building. In a flat, each apartment's water supply has its own ball valve, usually located in the kitchen or bathroom near the water meter assembly. The valve is closed by turning it clockwise until it can no longer move. If the valve is stuck and doesn't move, do not force it – this could damage the seal and worsen the leak.
In a detached or terraced house, the main stopcock is often in the basement, garage, or garden near the street connection. If the leak is coming from the street connection or main pipe, the street stopcock must be closed. This requires a special key, usually held by the water company or property manager. If you don't have the key, call the water company or emergency service.
If the leak is from a boiler, water heater, or washing machine, locate the inlet hose behind the appliance and close its valve. Many appliances have their own small ball valve, allowing you to shut off water to that specific appliance without cutting off the entire house's water supply.
Where Common Water Valves are Located in a Flat
In a flat, water valves are typically found in the following places: under the kitchen sink, behind the dishwasher, under the boiler, under the bathroom sink, on the shower mixer's inlet pipe, and at the toilet. The valve in front of each appliance allows you to contain a leak without cutting off water to the entire flat. If the leak is from under a sink, simply closing the valve under that sink is often enough.
- Kitchen: under the sink and behind the dishwasher
- Bathroom: under the sink, behind the shower mixer, under the boiler
- Toilet: a small valve behind the toilet cistern
- Apartment's main stopcock: kitchen or bathroom near the water meter assembly
Common Types of Water Leaks and First Aid
Not all water leaks are the same. Some can be resolved in a few minutes, while others require professional intervention. Below are the most common types and initial actions that every homeowner can take.
Leaking Connection Under a Kitchen or Bathroom Sink
This is the most common water leak. Water drips from under the sink or splashes from between the sink and the wall. First, close the valve under the sink. Then, dry the area and check if the leak is coming from a flexible hose, a fixing bracket, or the trap. If the leak is severe, do not use the sink until a plumber has replaced the seal or hose.
Toilet Leaks or Runs Continuously
If the toilet cistern runs continuously, it wastes water and can cause a flood if the drain becomes blocked. Check if the float in the cistern shuts off the water at the correct level. If water is overflowing, close the valve behind the toilet and call a plumber. If water is leaking from behind the toilet, it's likely a torn cistern connection seal – this needs replacing.
Boiler Leak
A boiler leak can be minor (dripping from the bottom) or major (spraying from where the pipe enters the boiler). First, turn off the boiler's power supply and close the inlet hose valve. Clear water from around the boiler and open the drain valve, if present. Do not attempt to repair a boiler leak yourself – it is a pressure vessel and requires a specialist.
Washing Machine or Dishwasher Leak
If a washing machine leaks, turn it off, close the water valve, and unplug it. Check if the leak is coming from the inlet hose, drain hose, or the machine's door seal. The drain hose might be blocked or installed too high, causing water to flow back.
Burst or Frozen Water Pipe
A frozen and burst water pipe is a serious emergency that can flood multiple rooms simultaneously. Immediately close the main stopcock, turn off the electricity, and start removing water. If the pipe is visible and possible, temporarily cover the burst area with plastic sheeting and tape until a professional arrives. Do not attempt to weld or glue the pipe yourself – it requires professional replacement.
Central Heating or Radiator Leak
If water is leaking from a radiator or heating pipe, shut down the system and close the valves behind the radiator. Cover the floor with towels and buckets. A heating system is a closed circuit, so the leak cannot be stopped at the main stopcock – you need to use the isolation valves behind the radiator or heat exchanger. If the leak is large, call the emergency service immediately.
How to Limit Water Damage Before the Plumber Arrives
After shutting off the water, the next goal is to limit damage. Water spreads quickly along skirting boards, walls, and pipe openings to neighbours, so it must be removed as quickly as possible. The longer water stands, the greater the risk of mould and structural damage.
- Use buckets, bowls, and towels to collect water
- Place towels or a waterproof barrier between the wall and floor
- Lift furniture, carpets, boxes, and electronics to dry areas
- Open windows and doors to ventilate and dry the area
- Photograph the damage for insurance purposes before cleaning up
- If water has reached a neighbour's flat, notify them immediately
When are Drying Machines Needed?
If water has spread over a large area or seeped under the floor, towels are not enough. In such cases, professional water extraction and drying are required. ToruFix's emergency plumbers use water extraction pumps, dehumidifiers, and drying equipment to speed up drying and prevent mould.
What Not to Do During a Water Leak Emergency
Some common reactions can worsen the situation or make repairs more expensive. Avoid the following:
- Do not leave water standing in the hope it will dry itself – mould appears within 24–48 hours
- Do not switch on electrical power before the area is completely dry
- Do not use a hairdryer or radiator for drying – this dries the surface but not the inside of the wall or floor
- Do not force a stuck tap – you might damage the seal or pipe
- Do not close doors and windows if the room is damp – ventilation is more important
- Do not ignore notifying neighbours if water may have gone into their flat
When to Call an Emergency Plumber
Many small leaks can be temporarily contained, but a permanent repair often requires a specialist. Call an emergency plumber if you cannot stop the leak yourself, if water has spread to multiple rooms, if you suspect a hidden burst pipe, or if the leak recurs after a temporary fix.
ToruFix OÜ's emergency service operates in Tallinn and Harjumaa 24/7. Our plumbers typically arrive within 30–60 minutes in Tallinn and 1–2 hours in Harjumaa. We bring the necessary spare parts and tools to repair the leak on-site without long waiting times.
How to Prevent Water Leaks
Prevention is always cheaper than repair. Water leaks usually occur due to old pipes, poor connections, negligence, or freezing. Small, regular maintenance significantly reduces the risk.
- Regularly check sink and toilet connections for moisture and rust marks
- Clean kitchen sinks and shower drains to prevent blockages and overflows
- Check the condition of boiler and washing machine hoses
- Insulate pipes in cold rooms and maintain minimal water circulation in winter
- Drain the system of seasonal properties before winter
- Know where the main stopcock is and ensure it turns easily
Apartment Association and Shared Pipe Maintenance
In an apartment building, checking only your own flat is not enough. The common plumbing system, basement water meter assembly, and roof ventilation pipes require regular maintenance. If several flats have experienced leaks or blockages in the past year, the apartment association should arrange a pipe inspection.
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