Water Tank Cleaning in Dubai

The first is dust. Dubai air carries fine sand almost continuously and it gets everywhere, including through a lid seal that has perished, a vent without an intact screen, or an overflow pipe with no cover. Once inside, it settles out as a layer of silt on the floor of the tank that no amount of drawing water off the top will remove.

The second is heat. Water in a rooftop tank, or in a tank exposed to sun, spends the summer warm. Warm, still water is a far more hospitable environment for biological growth than cold moving water, and a biofilm on the tank walls is the usual result. Chlorine residual in the incoming supply also dissipates faster in a warm tank, so the protection that came with the water does not last as long as you would expect.

The third is stagnation. Holiday homes, units between tenants, oversized tanks in low-occupancy properties and buildings that have been part-empty all leave water sitting for long periods, and the longer it sits the more the first two problems compound.

Added to those, tanks are frequently disturbed by building work. A renovation, a plumbing repair, a roof job or a new pump can all introduce debris, and a lid left off for an afternoon on a construction site is enough.

• Water that looks wrong: cloudy, grey, yellow or with visible particles, particularly on the first draw after a period of no use.
• Water that smells: musty, earthy, stale, or strongly of chlorine because someone has over-dosed it to mask a problem.
• Water that tastes wrong.
• Sediment collecting in tap aerators, shower heads, kettle bases, the washing machine inlet filter and the water heater.
• Staining in the WC cistern or around drains.
• Filters clogging faster than they used to, whether cartridge filters or a whole-house unit.
• Ants, insects or something larger getting in through an unsealed lid or an unscreened vent.

Two situations warrant a clean without waiting for symptoms: taking over a property where you do not know when the tank was last done, and after any building or plumbing work that opened the system.

If your water is discoloured right now, stop drinking it and call. Do not wait to see if it clears.

After the tank is physically clean, surfaces are treated with a chlorine-based disinfectant at a concentration and contact time we set out in the quote, so the whole internal surface, including the lid underside, the inlet and outlet areas and any internal pipework, is treated rather than just the floor. Contact time matters as much as concentration; rushing this stage is the most common corner cut in this trade.

The tank is then thoroughly flushed and refilled with fresh supply. We run taps through the property afterwards so the pipework itself is cleared, since there is no point putting clean water into a tank and leaving the old water sitting in the risers and branches.

Expect a mild chlorine smell for a short period after the tank is back in service. It should clear as the system is used. If it does not, tell us rather than living with it.

We look at the structural condition: cracks in a concrete tank, failed or blistered lining, damaged or bowed GRP panels, loose or corroded panel bolts, perished gaskets at panel joints, and any sign of leakage. We check the lid and its seal, because an ill-fitting or unsecured lid is the contamination route we find more than any other. We check vents and overflow pipes for intact insect screens, since an open overflow is an open door.

We check the fittings: inlet and float valve operation, outlet and isolation valves, the condition of internal pipework, the level indicator if there is one, and whether the tank is being overfilled or run too low. We note the sediment depth before removal, which tells you something about how long it has been and how fast it accumulates in your particular property.

You get told what needs attention now and what to keep an eye on. Where a repair is needed we quote it separately rather than presenting it as part of the clean.

That changes how the work is done. The tank is ventilated before entry, the atmosphere is treated as unsafe until proven otherwise, entry is controlled with someone stationed outside at all times, and lighting and any equipment taken in are suitable for the environment. Water and sludge are pumped out from above before anyone goes in. This is not the sort of job for a householder with a bucket and a torch. Confined-space entry is the part of this job that hurts people, which is why we labour the point.

Access is often the practical constraint. Underground tanks in villas frequently sit under a driveway, a terrace or a garden path with a heavy cover that has not been lifted since the villa was built, and sometimes planting or paving has been laid over it. We work out access on the survey rather than on the morning of the job.

Large buildings usually have sectional tanks: modular GRP or steel panels bolted together with gaskets at every joint, often divided into two compartments so one side can be taken out of service while the other keeps supplying the building. Where that is the case we can often clean one compartment at a time and keep water on, which matters a great deal in an occupied building. Where the tank is a single compartment, the supply is off for the duration and the timing has to be planned with residents.

Roof tanks also take the full sun. A tank without adequate insulation or shading heats the water inside it substantially in summer, which affects both the water quality and, incidentally, the cold tap being anything but cold. If the tank is exposed we will say so in the report.

Concrete tanks, typical underground in villas, can crack, and their internal lining or render can blister and break down, which puts fine material into the water and gives biofilm somewhere to grip. A concrete tank with a failed lining is a waterproofing repair as much as a cleaning job, and we handle both.

Polyethylene tanks, common as smaller roof tanks, are simple and hold up well, but degrade under prolonged UV if unprotected, and their lids and fittings are frequently the weak point.

Steel and stainless tanks are durable but corrode where the coating or passive layer has been damaged, usually at fixings and joints.

Whatever the material, the failure we open tanks and find is rarely the tank itself. It is the lid, the vent or the overflow.

For a villa we agree a window with you in advance so you can fill what you need beforehand. For an apartment building we work with building management to schedule the interruption, notify residents, and where the tank has two compartments, sequence the work to keep water available. For offices, restaurants, clinics and retail we usually work outside trading hours, at night or at a weekend, because a business with no water is a business that is closed.

Tell us at booking if there is anyone in the property with medical needs, a nursery, a restaurant kitchen or anything else where an interruption is more than an inconvenience, and we will plan around it.

If the interruption is the part you are weighing up, send us the tank type and the hours you need water and we will tell you what window the job actually needs before you commit to anything.

In an apartment, the building's tanks are usually common property and the responsibility of the owners' association or building management rather than the individual owner, though your building's own documents govern it. If your water is bad, the useful first step is to raise it with building management, and we are happy to speak to them directly. Where a unit has its own small tank or a filtration unit, that is yours.

For buildings, offices and commercial premises, tank cleaning is typically part of a planned maintenance regime with a documented schedule. Contractor registration, insurance on file, a work permit and often a method statement are required before access, and we handle that paperwork. PROTECH Dynamics is fully insured. Where you would rather run the tank clean alongside the rest of the property under a single maintenance contractor, it goes onto the same schedule.

What we can tell you is what drives it in practice. Buildings and communities generally run tank cleaning on a fixed cycle set by the owners' association or building management as part of their maintenance regime, and if you are in a managed building that schedule is the one that applies to you; ask building management what it is. Villa owners are managing their own asset, and the practical guide is the sediment depth we record at each visit, which tells you whether your tank needs doing more or less often than average.

Two rules override any schedule. Clean it when the water changes, and clean it after any work that opened up the tank or the pipework.

Recurring cleans can be scheduled so you do not have to remember, and can sit alongside our annual maintenance packages for properties that want the tank, the AC and the general maintenance handled together.

What moves the price:

• Tank size and the number of tanks.
• Underground or on the roof, which changes both the access and the controls the work needs.
• Access, including whether a cover has been paved or planted over and whether everything has to go up in a booked service lift.
• How much sludge and debris has to be removed.
• Single compartment or sectional, since a two-compartment tank can often be done a side at a time.
• Out-of-hours working, where the premises cannot lose water in trading hours.

Repairs found during the inspection are quoted separately so you can decide on them on their own merits.

Warranty terms for your job are confirmed in the written quotation. That covers what we did; it does not cover a tank recontaminating because the lid was left off afterwards, which is worth saying because it happens.

To book a tank clean, tell us the tank type, size and access, and we will schedule the visit.