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

Water tank cleaning in Kawthar Makkah

Kawthar is the former Sharai scheme four, south east of Al Sharai and outside the Haram boundary. Villas and apartment buildings line Al Qadisiyah Road, neighbourhood mosques including Mansour Faqih, Al Khair and Al Walidayn, the scheme eleven park on its western side and the channel of Wadi Mudarraja along its eastern edge. Tanks here serve a mixed district of flats and villas, and the nearby wadi channel means persistent humidity and high groundwater.

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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 Kawthar

Kawthar tanks carry persistent moisture at their base even without rain and may show damp patches or minor growth. The method is set out in full on the full Water tank cleaning page.

The first reason

Nearby Wadi Mudarraja raises groundwater and causes slow seepage

The wadi channel is very close and groundwater around the tank stays high year round. The lining may seep slowly from hydrostatic pressure and contaminated soil water may enter. Regular leak inspection is essential.

The second reason

Permanent humidity speeds fungal and algae growth

High moisture year round creates ideal conditions for biological growth. The tank may hold fungal threads or small algae even if sealed, especially if light reaches it.

The third reason

Regular streets and three mosques mean heavy use at certain times

Kawthar is a planned district but the three mosques set the usage pattern: dawn, afternoon and evening prayers cause demand spikes. The tank faces challenges from episodic water movement.

Kawthar on the map

Kawthar sits about 1.5 km from Salam and about 2.5 km from Mughammas.

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Before treatment

The condition of the tank decides the method

Wadi Mudarraja channel on the eastern edge means groundwater sits close to the surface and may bring permanent moisture around the tank.

Fine brown sediment beneath shallow water

The layer on the floor

Floor layer holds heavy metals from groundwater influenced by the nearby wadi and may be brown or red, needing very strong wash.

Light and algae

Algae and green growth happen fast because humidity is high, and even sealed tanks may carry small growth from dampness and poor ventilation.

A damp concrete wall carrying a dark deposit

The deposit on the wall

Tank walls carry a mineral layer and constant moisture may speed green or brown tissue growth on the surface.

A concrete surface with a fine hairline crack

The lining and hairline cracks

Lining may have cracks from hydrostatic pressure and constant dampness, and cracks may widen over time as contaminated water seeps in slowly.

The lid of a water tank on a building roof

The lid and the access hatch

Covers and ports may seep from high humidity and water table pressure and need regular external resealing.

A plastic pipe leaving the exterior wall of a building

The vent and the overflow pipe

Vent holes and overflow pipes clog fast from silt and minerals from influenced groundwater and need very frequent cleaning.

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.

Landmarks of Kawthar

Al Qadisiyah Road runs the district east west, and Mansour Faqih, Al Khair and Al Walidayn mosques mark heavy use points. Wadi Mudarraja channel on the eastern edge marks the boundary and the hydrogeology. Cleaning must account for these geological factors.

Al Qadisiyah Road
Mansour Faqih Mosque
Al Khair Mosque
Al Walidayn Mosque
Scheme Eleven Park
Wadi Mudarraja

Questions about this district

Humidity around the tank is permanent and constant. Does it cause leaks?

Yes, constant moisture may cause slow seepage from the lining and seals. Regular inspection of external seepage is needed and you may need strong external sealing.

The ground under the tank is always wet even without rain. Why?

Groundwater is high here because Wadi Mudarraja is close, and moisture wicks up from the soil. The tank may seep small amounts from hydrostatic pressure.

The water smells of silt or soil. What causes this?

Earthy smell comes from nearby groundwater influenced by Wadi Mudarraja. Soil and minerals from the ground enter the water slowly. Cleaning and disinfection help but base groundwater quality is decisive.

Do the three mosques next to the tank cause very heavy use?

Yes, dawn, afternoon and evening prayers cause use spikes and ablution peaks. The tank must be large enough to handle this load.

Villas and apartment blocks are mixed. Is one tank enough?

Depends on tank size and use. If it is too small you may face pressure problems at peak times. Regular cleaning improves performance.

Does Kawthar need more frequent cleaning than other schemes because of Wadi Mudarraja?

Yes. Close proximity to the wadi, constant humidity and heavy mosque use means more frequent cleaning than schemes far from wadis.

How much does water tank cleaning in Kawthar 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 Kawthar.