Plumber Dubai: Leak Detection, DEWA High Water Usage Alerts, Water Heaters, Tanks and Drains

In Dubai, DEWA is responsible up to the meter; everything after it, including tanks, pumps, pipes, heaters, irrigation and pools, is the property's responsibility. DEWA recommends a meter leak test twice a year and offers a High Water Usage Alert for smart meters, and identifies tanks, bathrooms, kitchens and pools as the most likely leak sites. Dubai Municipality advises cleaning and disinfecting tanks and plumbing at least every six months with approved companies, and publishes Legionella control guidelines. Shade or insulate rooftop tanks, service water heaters, flush outlets after travel and fix the leak source, not the stain.

Why plumbing in Dubai has its own problems

Plumbing in Dubai works under conditions most building codes were not written for. Summer heat turns rooftop tanks and exposed pipes into heaters, so "cold" water can arrive scalding. Desalinated water is supplied through DEWA's network, then stored in tanks and moved through internal pipes and pumps that the owner, not DEWA, is responsible for. Villas have tanks, pumps, garden irrigation and pools that can leak unseen for months, while apartments sit above and below neighbours whose leaks become your ceiling stain. And because DEWA bills by consumption, a hidden leak shows up first as a bill nobody can explain.

This guide explains where responsibility for water systems sits in Dubai, how to find leaks using DEWA's own tools and your meter, how to look after tanks, water heaters, pumps and drains, what Dubai Municipality and international guidance say about keeping water systems safe, and how to choose a plumbing company.

Who is responsible for what: DEWA, owners and tenants

DEWA has stated repeatedly that its responsibility for connections and maintenance is limited to the meter, and that internal connections after the meter are the customer's responsibility, across residential, commercial and industrial properties. Everything downstream of the meter, including tanks, pumps, pipes, water heaters, fittings, irrigation and pools, belongs to the property, so leaks there are paid for on the property's bill and repaired by the property's contractor. Between owners and tenants, who pays for which repair depends on the tenancy contract and the nature of the fault, so check the contract and agree in writing before major work.

DEWA also recommends that water tanks and internal connections comply with its specifications to ensure supply availability, and that internal water pipes are connected to the water tank rather than directly to the main water line.

Finding leaks: DEWA's tools and your meter

The meter test

DEWA encourages customers to test for leaks twice a year by switching off all water devices and checking the water meter: if the meter keeps running while nothing is in use, there is a leak. For a clearer result, read the meter, use no water at all for a period, and read it again.

High Water Usage Alert

DEWA's High Water Usage Alert service notifies customers with smart meters of unusually high consumption that may indicate a leak after the meter. According to a DEWA primer reported by Gulf News, an alert is sent when the smart meter continuously records consumption for at least 48 hours that is substantially higher than the customer's average daily consumption over the previous three months, with reminders every 15 days for up to three months; DEWA notes the service cannot guarantee that every leak will be detected. The Smart Living dashboard in the DEWA app and website shows daily, monthly and annual consumption, which makes sudden changes easy to spot.

Where leaks usually are

DEWA lists water tanks, bathrooms, kitchens and swimming pools as the most likely places for leaks, with tank leaks caused by deterioration of the tank body or its connections or improper positioning, and leaks in taps, pipes, toilet cisterns and water heaters caused by ageing and lack of maintenance. Water spots on floors, walls and ceilings, or around washing machines, are likely signs of leaks in internal connections or the irrigation system. DEWA's primer reported by Gulf News gives the example that a leaking toilet could waste about 200 gallons of water a day.

Our plumbing installation, repairs and leak detection service locates hidden leaks behind walls, under floors and in buried pipes.

Water tanks: cleaning, heat and contamination

What reaches the tap depends on the tank and the pipes between the meter and the tap. A Dubai Municipality public health official told Khaleej Times that water supplied by DEWA is fit for human consumption, and that problems with suspended particles and contamination mainly occur in storage tanks and pipelines inside buildings, and that long exposure to heat can affect the tank's inner material or coating, which is why tanks should be shaded or coated with heat insulation. In 2025, launching its Safe Water for a Healthy Community initiative, Dubai Municipality advised residents to disinfect and clean water tanks and plumbing systems at least every six months using companies approved by the municipality.

A good tank programme includes:

Cleaning and disinfection at least every six months by a municipality-approved company, with a cleaning certificate and date recorded.
Sealed lids and screened vents and overflows so insects, birds, dust and rainwater cannot enter.
Shade or insulation for rooftop and above-ground tanks, which reduces heat damage to linings and helps with scalding cold water in summer.
Inspection of the tank body, ladder, float valve and connections for cracks, corrosion and leaks.
Flushing after the clean so sediment does not move into the pipes and heaters.

Our water tank cleaning service covers villa and building tanks; ask about the approval and certificate you need for your building when you book.

Why the cold tap runs hot in summer

Every summer, residents across Dubai find their cold water too hot to use; Khaleej Times readers have long complained of scalding water from overhead tanks. Rooftop tanks and pipes exposed to direct sun absorb heat all day. The practical fixes are shading or insulating the tank, insulating exposed pipes on roofs and façades, and in villas, considering tank location and shading when renovating. Many residents also switch off the water heater in the hottest months, because the insulated hot-water cylinder can deliver cooler water than the cold line. Our pipe insulation service insulates exposed hot and cold lines.

Water heaters and Legionella

Water heaters in Dubai homes face hard water, long hot summers and frequent travel that leaves systems stagnant. Dubai Municipality publishes Technical Guidelines for Legionella Control in Water Systems, which include a checklist for domestic hot, warm and cold water systems and procedures for cleaning and disinfecting internal water distribution networks in buildings. The US Centers for Disease Control and Prevention explain that Legionella grows best between 25°C and 45°C, recommend storing hot water above 60°C, and warn that cold water above 25°C and stagnant water increase the risk.

Dubai Municipality's guideline sets specific values for domestic systems, including hot water storage of at least 60°C, hot water at outlets of at least 50°C after one minute of running, cold water storage and distribution at or below 20°C, and water heaters cleaned, drained and disinfected at least twice a year; our commercial building maintenance guide sets out the full table.

In Dubai, cold water easily rises above 25°C in summer, and water left standing in pipes while residents travel is exactly the stagnant water the guidance warns about. Practical measures:

Keep water heaters at a temperature that limits Legionella, following the manufacturer's and the guidance's recommendations, and remember that very hot water can scald, especially children and elderly people.
Flush after travel: run all taps and showers, hot and cold, for several minutes after returning from a long absence.
Descale and service water heaters regularly: limescale and sediment insulate the element and create places for bacteria to grow.
Check the safety valve, thermostat and anode according to the manufacturer's schedule.
Clean shower heads and aerators, where scale and biofilm collect.

Our water heater maintenance service covers electric and central water heaters.

Hard water, limescale and filtration

White crusts on taps, shower heads and glass, kettles that fur up quickly, and water heaters that lose efficiency are all signs of mineral deposits. Scale also narrows pipes and clogs aerators, valves and washing machine inlets. Options range from regular descaling of fittings and heaters, to point-of-use filters for drinking and cooking, to whole-house filtration or softening for villas. The right choice depends on what you want to solve: taste, sediment, scale or all three, and every system needs its own maintenance, because a neglected filter becomes a contamination point itself. Our water filtration system installation and maintenance service sizes and maintains filters for homes and businesses.

Pumps and water pressure

Most villas and many buildings in Dubai rely on booster pumps to move water from tanks to taps. Pumps that run constantly, cycle on and off every few seconds, or make new noises are telling you something: a leak downstream, a failed pressure vessel, a faulty pressure switch or a worn pump. Low pressure on upper floors, at one bathroom or only on hot water usually has a specific cause, such as a clogged filter, a partly closed valve, scale in a mixer or an undersized pipe, and should be diagnosed rather than solved by a bigger pump. Our water pump maintenance and fixture repairs and pressure checks services cover both.

Drains, smells and blockages

Kitchen sinks collect fat and food, bathroom drains collect hair and soap, and floor drains in rarely used bathrooms dry out and let sewer smells into the home. Practical habits prevent most problems: never pour cooking fat down the sink, use strainers in kitchens and showers, pour water into rarely used floor drains every week, and do not use drains as bins. Recurring blockages, gurgling, slow drainage in several fixtures at once, or smells that return after cleaning point to problems further down the line, such as a blocked stack, a failed vent or a damaged pipe. Our drain cleaning and drainage maintenance service clears and inspects drainage lines. For restaurants and commercial kitchens, grease traps are a regulated system of their own; our kitchen exhaust and grease trap guide explains the requirements.

Villas: irrigation, pools and buried pipes

Villas hide more pipework than apartments: buried supply lines from the tank, garden irrigation networks, pool filtration and top-up lines, outdoor taps and sometimes septic or sewage tanks. DEWA identifies the house irrigation system and swimming pools among the likely sources of leaks. Signs include unusually green or soggy patches in the garden, a pool that needs constant topping up, paving that sinks or cracks, and a tank that empties faster than expected. Leak detection in villas often needs pressure testing of separate zones, acoustic or thermal tools, and checking the irrigation controller and valves. Our villa maintenance guide covers pools, gardens and tanks as part of a complete villa programme, and our septic and sewage tank service handles properties with their own tanks.

Apartments: leaks from above and below

In towers, a leak rarely stays in one apartment. A stain on your ceiling may come from the bathroom, AC drain or pipe of the unit above; your leak may damage the unit below. When a stain appears, document it with dated photos, inform building management, and get the source identified before anyone opens ceilings or walls. Common sources include failed bathroom waterproofing or grout, leaking shower mixers and waste connections, AC condensate lines, washing machine hoses and pipe joints inside walls. Where the source is inside a neighbour's unit or a shared riser, building management usually coordinates access and repair. Our waterproofing service repairs bathroom and balcony waterproofing once the leak source is confirmed.

Washing machines, dishwashers and appliance hoses

DEWA specifically mentions washing machine hoses among the places to check for leaks, and appliance connections cause some of the most sudden floods in Dubai apartments. Rubber inlet hoses age, especially in hot laundry rooms, and a hose that bursts while nobody is home can release water until someone notices. Replace inlet hoses according to the manufacturer's advice or when they show cracks, bulges or rust at the fittings, consider braided hoses or units with built-in leak protection, keep isolation valves accessible and close them before travel, and check that the drain hose is properly secured so it cannot slip out of the standpipe during a drain cycle.

AC condensate lines: the leak that is not plumbing

Many "plumbing" leaks in Dubai ceilings are actually air conditioning condensate. Split and ducted units produce a steady flow of water in humid months, which drains through small pipes that can block with slime and dust or come loose inside ceilings. A stain near an AC unit, dripping from a ceiling grille, or water that appears only when the AC runs points to the condensate line rather than the water supply. These lines should be cleaned during AC servicing and run with a continuous fall to a drain. Our Dubai AC maintenance guide covers condensate drains in detail.

Leak damage, mould and insurance

Water damage that is not dried quickly becomes mould damage. The US Environmental Protection Agency advises drying water-damaged areas within 24 to 48 hours to prevent mould growth and fixing the moisture source. After a leak in Dubai: stop the water at the nearest valve, switch off electricity to affected areas if water is near fittings, take dated photos and videos, inform building management or the landlord, remove wet items, and dry the area with ventilation and dehumidification. If you have home contents or building insurance, check the policy's requirements for notification and documentation before repairs start, because many policies require evidence of the damage and its cause. Our Dubai deep cleaning guide covers mould cleaning after the leak is fixed.

Bathroom renovations: getting the plumbing right

Renovation is the moment to fix the problems that cause leaks for years: replace old supply pipes and mixers while walls are open, install accessible isolation valves for each bathroom and kitchen, make sure waste pipes have proper falls and vents, waterproof shower areas and floors fully before tiling and test them before tiles go on, and fit access panels for concealed cisterns and mixers so future repairs do not mean breaking tiles. Ask for a pressure test of new supply pipework before walls are closed, and keep photos of where pipes run.

Water saving that also protects the home

DEWA's guidance includes replacing single-flush toilets with dual-flush toilets and checking toilets periodically for leaks. Water-saving aerators on taps, efficient shower heads, timers on irrigation and fixing dripping taps promptly all reduce consumption on the DEWA bill. Many of the same measures also protect the home: a toilet cistern that leaks wastes water and wears its valve; a dripping tap usually means a worn cartridge that will eventually fail; and an irrigation system on a timer is less likely to flood a garden or a basement.

Testing water quality

If tap water changes colour, smell or taste, or if a tank has not been cleaned for a long time, a laboratory test tells you what is actually in the water rather than guessing. Dubai Municipality's Safe Water for a Healthy Community initiative, for example, involves specialist teams collecting water samples for analysis at Dubai Central Laboratory. For homes and buildings, sample after a tank clean and whenever residents report a problem, take samples from the tank and from taps at the far end of the system, and keep the results with the cleaning certificates. A test is only as useful as the sampling, so use a laboratory or company that follows proper sampling procedures.

Waiting for hot water: recirculation in villas

In large villas, the hot water heater can be far from bathrooms, so residents run the tap for a long time before hot water arrives, wasting water and money. A hot water recirculation loop with a pump and timer keeps hot water close to the outlets; smaller point-of-use heaters near distant bathrooms are another solution. Recirculation loops need to be designed and maintained so that water in the loop stays hot rather than lukewarm, which matters for the same Legionella reasons described above.

Pressure in high-rise buildings

Tall towers manage pressure with pumps, break tanks and pressure-reducing valves so that upper floors get enough pressure and lower floors are not overpressured. Inside an apartment, symptoms such as banging pipes, mixers that drip after closing, or pressure that varies through the day can point to a failing pressure-reducing valve, worn cartridges or air in the system. Report building-wide pressure problems to building management, which manages the risers and pump rooms; problems in one apartment are usually inside its own pipework and fittings.

What counts as a plumbing emergency

A burst pipe, hose or tank, or water flowing that you cannot stop.
Water near electrical fittings, sockets or the distribution board.
Sewage backing up into the home.
No water at all when neighbours have supply, which may indicate a failed pump or valve.
A water heater leaking, overheating or with a safety valve discharging continuously.

In any of these, close the nearest isolation valve or the main valve, switch off electricity to affected areas if water is near electrics, and call for help. Knowing where your main valve and the valves for each bathroom and kitchen are, before you need them, saves minutes that matter.

Know your property's valves and meter

Every resident should know where the water meter is, where the main stop valve for the apartment or villa is, where the isolation valves for each bathroom, kitchen, water heater and washing machine are, and how to switch off the booster pump in a villa. Label them, keep them accessible rather than hidden behind stored items, and test that they turn. Take a photo of the meter reading on the first day of each month and compare it with the DEWA bill and app; a sudden jump with no change in habits is the cue to run the meter leak test.

Tenants and landlords: reporting leaks properly

Many plumbing disputes in Dubai come down to timing and evidence. Tenants who notice a leak, a damp patch or a rising bill should report it in writing to the landlord or property manager straight away, with photos, the date it was first noticed and any DEWA alerts received, and should take reasonable steps to limit damage, such as closing the nearest valve. Landlords and managers who respond quickly with a proper diagnosis usually pay far less than those who wait until ceilings, cabinets and flooring are damaged. Whatever the contract says about who pays for which repair, a written record from the first day protects both sides, and a plumber's report stating the cause makes the responsibility question much easier to settle.

Choosing fittings that last in Dubai water

Fittings in Dubai have to cope with scale, heat and long periods of non-use. When replacing taps, mixers, valves and shower sets, choose products from manufacturers that supply spare cartridges and seals locally, so a worn part can be replaced without changing the whole fitting. Ceramic disc cartridges generally handle scale better than old washer-type valves, accessible isolation valves under every sink and toilet make future repairs quick, and braided flexible connectors should be replaced when they show rust or kinks. Concealed cisterns and mixers save space but need access panels; without them, a simple valve replacement becomes a tiling job.

Silicone, grout and the small leaks that cause big damage

Not every bathroom leak comes from a pipe. Cracked grout, silicone that has peeled away from the bath or shower tray, and gaps around shower screens let water seep behind tiles and into the floor and ceiling below, especially in showers used several times a day. Inspect silicone joints around baths, showers, basins and kitchen worktops every few months, replace any that are black with mould, split or lifting, and reseal grout in shower areas when it becomes porous. It is a small job compared with the damage a slow seep can do to the apartment below over a year.

When resealing, remove the old silicone completely, clean and dry the joint, and use a sanitary-grade sealant rather than spreading new silicone over old.

Before and after summer travel

Many Dubai residents leave home for weeks in summer, and unattended plumbing causes some of the most expensive leaks of the year. Before leaving: close the main valve to the apartment or villa if the building allows, or at least isolate the washing machine, dishwasher and water heater; switch off the water heater; pour water into floor drains; and ask someone to check the home if possible. Keep the DEWA app notifications on so a High Water Usage Alert reaches you abroad. On return: open valves slowly, run every tap and shower, hot and cold, for several minutes to flush stagnant water, check under sinks and around the water heater and washing machine for drips, and watch the meter for a day.

Restaurants, offices and commercial buildings

Commercial plumbing carries more load and more risk. Restaurants have grease traps, high-temperature dishwashers and floor drains; offices have shared washrooms and pantries; buildings have pump rooms, risers and large tanks. A commercial programme includes scheduled tank cleaning, pump servicing, drain and grease trap maintenance, Legionella risk controls on hot and cold systems, water meter monitoring by area where possible, and an emergency procedure for major leaks. Our commercial building maintenance guide and annual maintenance contract guide explain how plumbing fits into building operations.

A plumbing maintenance calendar for Dubai

When	What to do
Monthly	Check the DEWA app for consumption changes; look under sinks, around the water heater and washing machine; pour water into rarely used floor drains
Every 6 months	Tank cleaning and disinfection by an approved company; meter leak test; descale shower heads and aerators
Before summer	Check tank shading and pipe insulation; service pumps; plan for travel shut-offs
After summer travel	Flush all outlets hot and cold; check for drips; watch the meter for a day
Yearly	Water heater service and descaling; irrigation system check; drain inspection where problems recur

Common plumbing mistakes in Dubai

Ignoring a rising DEWA bill

A bill that climbs without a reason is the earliest warning of a hidden leak.

Assuming DEWA will fix it

Everything after the meter is the property's responsibility.

Never cleaning the tank

Dubai Municipality advises cleaning and disinfection at least every six months.

Leaving water stagnant after travel

Stagnant warm water is what Legionella guidance warns against; flush every outlet on return.

Fixing the stain, not the source

Painting over a ceiling stain without finding the leak guarantees it returns.

Pouring fat down the sink

Fat hardens in pipes and causes the most common kitchen blockages.

How to choose a plumbing company in Dubai

A licensed company with trained technicians and supervision.
Leak detection equipment such as pressure testing, acoustic and thermal tools, so walls are opened only where needed.
Diagnosis before quotation: a clear explanation of the cause, not just a part replacement.
Approval for regulated work, such as tank cleaning, and certificates you can show building management.
Written quotations and reports with photos before and after.
Related trades: waterproofing, AC drains, tiling and ceiling repair, so the job is finished, not just the pipe.

Plumbing in Dubai with Power Zone

Power Zone is a building services company with its head office in Court 2203, Office 149, Business Bay, Dubai, operating under ZONE15 Technical Services L.L.C (Commercial License No. 1289514). Power Zone and Zone 15 are one business family under the same management; you can read more on our About page.

We provide plumbing installation, repairs and leak detection, water heater maintenance, water tank cleaning, pump maintenance, drain cleaning, water filtration and pipe insulation. For Lebanon, see our plumbing guide for Beirut. Every job follows the same path: your request, a site visit and diagnosis, a clear quotation you approve before work starts, the work, and handover with a written report. Request a plumber.

The same topic in Lebanon

Plumbing in Beirut: the complete guide

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Frequently asked questions

Is DEWA responsible for leaks in my home?

No. DEWA states that its responsibility for connections and maintenance is limited to the meter; internal connections after the meter, including tanks, pipes, heaters and fittings, are the customer's responsibility.

How do I check for a water leak in Dubai?

DEWA recommends switching off all water devices and checking the meter twice a year: if it keeps moving with nothing in use, there is a leak. The DEWA app's consumption dashboard also shows unexplained increases.

What is DEWA's High Water Usage Alert?

A DEWA service for smart meters that notifies customers of unusually high consumption that may indicate a leak. Gulf News reported it triggers after at least 48 hours of consumption substantially above the three-month daily average.

Why is my DEWA water bill suddenly high?

Common causes are a leaking toilet cistern, a dripping water heater or tank, irrigation or pool leaks in villas, and hidden pipe leaks. DEWA's primer reported by Gulf News says a leaking toilet could waste about 200 gallons a day.

Where do most leaks happen?

DEWA identifies water tanks, bathrooms, kitchens and swimming pools as the most likely leak locations, along with taps, pipes, toilet cisterns, water heaters and washing machine hoses.

How often should water tanks be cleaned in Dubai?

Dubai Municipality advises residents to clean and disinfect water tanks and plumbing systems at least every six months using companies approved by the municipality.

Why does my cold water come out hot in summer?

Rooftop tanks and exposed pipes absorb heat from the sun. Shading or insulating tanks and insulating exposed pipes helps; many residents also switch off the water heater in the hottest months.

What temperature should my water heater be?

The US CDC recommends storing hot water above 60°C to limit Legionella, which grows best between 25°C and 45°C. Follow the manufacturer's instructions and protect children and elderly people from scalding.

Do I need to flush my pipes after travelling?

Yes. Stagnant water is a Legionella risk factor. After a long absence, run every tap and shower, hot and cold, for several minutes before normal use.

Why does my bathroom smell of sewage?

Usually a dry floor drain trap in a rarely used bathroom, a blocked or failed vent, or a damaged waste pipe. Pour water into floor drains weekly; persistent smells need inspection.

Who pays for a leak from the apartment above?

It depends on where the leak comes from and the building and tenancy arrangements. Document the damage, inform building management, and have the source identified before repairs.

Is the leak in my ceiling plumbing or the AC?

Stains near AC units, drips from grilles, or water that appears only when the AC runs usually point to the condensate drain rather than the water supply.

How do I detect leaks in a villa garden or pool?

Look for soggy or unusually green patches, sinking paving, a pool that needs constant topping up, or a tank that empties quickly. Zone pressure tests and acoustic tools locate buried leaks.

What should I do immediately after a leak?

Stop the water, switch off electricity near wet areas, take dated photos, inform building management or the landlord, and dry the area quickly; the EPA advises drying within 24 to 48 hours.

Does Power Zone provide plumbing services in Dubai?

Yes. Power Zone provides plumbing installation and repairs, leak detection, water heater maintenance, tank cleaning, pump and drain maintenance, filtration and pipe insulation in Dubai.

How do I book a plumber with Power Zone?

Send a request through the contact page or WhatsApp with the property type and the problem, ideally with photos or your DEWA consumption history. We arrange a visit and send a clear quotation for approval.

Plumbing in Dubai: the complete guide