A technician washing the inside wall of a water tank with a pressure hose

Water tank cleaning in Al Nazlah Al Sharqiyah Jeddah

Al Nazlah Al Sharqiyah is a dense popular neighbourhood in south Jeddah with old apartment blocks on very narrow streets. A single old tank serves dozens of residents in a tall building, and water barely reaches the top floors at peak times. The oldest pipes in the city sit beneath these narrow lanes and have never been replaced. They leak and draw contaminated water up from below. The proximity to Old Makkah Road means dust and noise, and the tank sits exposed to the street and the air above it.

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Potable-rated materials

Linings and disinfectants cleared for drinking water tanks, not general-purpose products.
You get the downtime first

How many hours the tank is out of service, told before we start rather than after we finish.
A first-draw flush

We run the first draw off after refilling, and the tank is not handed back until the water runs clear.
Ground and roof tanks

Villas, apartment blocks and premises that need a written record of each visit.

Why the job is different in Al Nazlah Al Sharqiyah

In the old blocks here, the rooftop tank leaks water from cracks in the walls, the roof is exposed, and dust and insects enter through simple ventilation holes as traffic passes on the main road below. The method is set out in full on the full Water tank cleaning page.

The first reason

Old apartment blocks with one tank for many floors create pressure problems

A single old tank serves twenty flats or more, creating low pressure at the top floors. The tenth floor flat may have no water at peak hours. Old pipes crack under the pressure cycling, and metals deposit rapidly in the tank as rust and corrosion speed up. Pressure surges and drops by turns, killing weak fittings.

The second reason

Ancient pipes leak and draw contaminated groundwater back in

Narrow streets and old buildings hide the city's oldest water and drainage pipes, now past their end of life. Old water pipes leak and draw dirty water up from below. This contaminated groundwater returns to the tank laden with bacteria and particles. Strong disinfection and frequent cleaning are essential because the pipes cannot be easily repaired.

The third reason

Exposed rooftop and insects from the busy street clog the tank

Old Makkah Road runs close by and heavy traffic raises dust and diesel fumes that enter through simple vent holes. The exposed roof expands and shrinks in the sun, opening cracks and allowing seepage. Insects and rodents from the busy street below find easy entry through simple holes and hairline cracks.

Al Nazlah Al Sharqiyah on the map

Al Nazlah Al Sharqiyah sits about 1 km from Al Nazlah Al Yamaniyah and about 1.5 km from Al Thaghr.

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Before treatment

The condition of the tank decides the method

Al Nazlah Al Sharqiyah is a dense district of old apartment blocks on very narrow streets, sitting near Old Makkah Road which is heavily trafficked, and has very old drainage networks that seep.

Fine brown sediment beneath shallow water

The layer on the floor

The floor holds a thick layer of rust and mineral sediment from old pipes and stagnant water that needs hours of vigorous scrubbing to remove.

Light and algae

The inner walls carry black patches of bacteria and fungus growing from moisture, stagnant water and sparse light.

A damp concrete wall carrying a dark deposit

The deposit on the wall

The deposit on the walls is layered rust, salts and bacterial colonies that need repeated scrubbing and strong disinfection to shift.

A concrete surface with a fine hairline crack

The lining and hairline cracks

Fine cracks and weak lining in an old tank allow water to seep out and draw dirty water from the surrounding soil inward.

The lid of a water tank on a building roof

The lid and the access hatch

The old simple tank cover and wide vents allow insects, dust and algae from the surrounding air to enter freely.

A plastic pipe leaving the exterior wall of a building

The vent and the overflow pipe

Overflow and vent pipes are corroded and weak, leaking water and bacteria, and may need complete replacement.

How we work

1
Inspect before the drain

Tank type and material, the condition of the lining, the depth of the sediment, the lid and the vent, and where the drained water will go. We agree the window without supply before anything is opened.
2
Drain, then lift the sludge

The water leaves through the outlet, then the layer beneath it is taken out by hand and by suction. That layer is the reason for the visit, not the water that ran out ahead of it.
3
High pressure wash

Walls, floor and the joint where they meet, with a brush wherever the film resists, then the wash water is taken out completely so nothing we lifted settles again.
4
Disinfect and put back in service

Disinfectant over every internal surface, left for its contact time and then rinsed out, followed by the refill, a first draw off at the taps, and a report on what was inside the tank.

What water tank cleaning includes

An inspection before the valve

Tank type, lining condition, depth of sediment, lid and vent, recorded before any water leaves.
Full drain and sediment removal

The water through the outlet, and the layer below it by hand and by suction until the floor itself is showing.
Pressure washing walls and floor

High pressure across the surfaces and corners, and a brush on anything water alone will not lift.
Disinfection after the wash

A disinfectant intended for drinking water tanks, named to you before it is used, left for its contact time and then rinsed out.
Refill and the first draw off

We refill, run the taps so the new water moves through the pipework, and tell you when it is ready to use.
A report and the next date

What was inside the tank, anything on the lid or the lining that needs repair, and a sensible date for the next clean.

The character of Al Nazlah Al Sharqiyah

Apartment district: residential blocks, repeated floors and shared entrances

An apartment district with old dense blocks means one small tank serves many residents, and very old pipes leak and draw in contamination. Low pressure and groundwater contamination speed sediment and bacterial growth. Tank cleaning alone cannot fix the fundamental problems with ancient failing pipes.

Questions about this district

The upper flat has no water in the morning and evening. Is the tank weak or the pipes?

The tank is too small for the large population in the block. Pressure drops when several flats open taps at once. Old pipes also leak water continuously, so the tank empties faster. The problem needs a larger tank or an extra pump, not just cleaning.

Water from the upper flat is cloudy but the lower flat runs clear. Why?

Old long pipes from the tank to the upper flat carry sediment, rust and bacteria. After periods without use, stagnant water rusts and turns cloudy. The lower flat is close to the tank and receives fresher water.

Does the exposed rooftop tank let insects in and cause white patches on the walls?

Yes. The exposed roof and proximity to busy Old Makkah Road allow insects to enter through simple vents. White patches are colonies of bacteria that grow on wet walls inside the tank.

Water from the tap smells strange and is cloudy. Is it the tank or the old pipes?

Both. The tank holds sediment and bacteria, and old long pipes carry rust and metal particles. Water sitting still in pipes overnight becomes worse. Tank and pipe cleaning together are essential, or pipes need replacement if corrosion is severe.

Does the narrow street around the block create problems for tank cleaning?

Yes. The street is very narrow and vehicles block access. Reaching the roof means carrying equipment up narrow staircases through crowded flats. Cleaning takes much longer than at modern buildings with courtyards and open spaces.

The tank is old, the block is old and narrow. Will it withstand high pressure cleaning?

Very old concrete tanks may not tolerate very high pressure. Cleaning must be careful and pressure moderate. If the tank is cracked or very weak, it may need replacement rather than deep cleaning.

How much does water tank cleaning in Al Nazlah Al Sharqiyah cost?

It is set after the inspection, because the price follows the type of infestation, the size of the space, how far it has spread and the number of visits it needs. Send a photo and a description on WhatsApp and we will give you an estimate before we reach Al Nazlah Al Sharqiyah.