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

Water tank cleaning in Al Mudaa Al Jadid Makkah

Al Mudaa Al Jadid is a new scheme in the south of Makkah within the Crown Prince developments, mostly empty granted plots with scattered new villas on vast flat open ground. Wadi Uranah cuts through and Jabal Labanah rises above it. Tanks here face unique challenges: building is slow and vacant plots collect moisture and floods, the tank may sit unused for weeks before its first fill. The delay between filling and use is when mould finds its foothold.

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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 Mudaa Al Jadid

Tanks fill rarely and may sit half empty for weeks, and any water in them clouds quickly from moisture and mould if use is not regular. The method is set out in full on how we approach Water tank cleaning.

The first reason

Flat open ground and very high moisture

Vast open plots with no shelter raise moisture continuously, dew and mould accumulate around ground and overhead tanks. A tank used irregularly becomes a breeding ground for mould and bacteria spores.

The second reason

Wadi Uranah and seasonal floods and silt

The wadi cuts through the scheme visibly, after seasonal rain it carries floods carrying silt and microbial growth from wadi low ground. Ground tanks close to it risk flooding and seepage.

The third reason

Slow building and irregular use

Building here is very slow and homes fill gradually, tanks may sit empty for months or half full. Still water in an unused tank grows mould and bacteria colonies rapidly.

The character of Al Mudaa Al Jadid

New development: ongoing construction and vacant plots between the homes

In a slow growing new scheme with irregular use, the new tank quickly becomes a moisture and mould reservoir. Cleaning must be thorough and frequent until use and occupation stabilise.

Before treatment

The condition of the tank decides the method

A new subdivision within Crown Prince schemes on vast flat open land, empty granted plots with scattered new villas, crossed by Wadi Uranah with Jabal Labanah enclosing it.

Fine brown sediment beneath shallow water

The layer on the floor

Floor deposits are fine earth and wadi silt if seepage occurred, or grey mould if the tank stood still. Needs deep cleaning and high pressure to clear.

Light and algae

Light and algae are low in sealed tanks, but high moisture speeds fungal growth rapidly in vent openings and any small cracks.

A damp concrete wall carrying a dark deposit

The deposit on the wall

Walls may carry grey or black mould film from continuous moisture if the tank was unused, needing brush and hot strong water to clear completely.

A concrete surface with a fine hairline crack

The lining and hairline cracks

The new concrete lining may have fine cracks from drying cycles and moisture swings, so deep disinfectant penetration is essential to prevent mould taking root.

The lid of a water tank on a building roof

The lid and the access hatch

The cover seals well but we check for dew and mould accumulation around openings in this very damp environment, external cleaning is necessary.

A plastic pipe leaving the exterior wall of a building

The vent and the overflow pipe

Vent and overflow may be blocked by mould or silt from continuous moisture, so we open them fully and verify function after 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.

What is different about South Makkah Sub-Municipality

South Makkah sub municipality is the belt of Crown Prince schemes south of Al Ukayshiyah, along the Al Laith road and the extension of Ibrahim Al Khalil Road to the Fifth Ring Road and the Non Muslims bypass. Most of it is still bare: granted plots awaiting houses, new villas standing alone, open building sites and unfinished paving and drainage. Wadi Uranah and its tributaries cross the low ground and hold water after rain, hills close it in, and rodents, reptiles and scorpions shelter in stacked materials and foundation pits before the neighbourhoods fill up.

Questions about this district

The tank sat half full for weeks. Now the water is cloudy and smells strange. Normal?

Still water and high moisture grow mould and bacteria rapidly. Tank cleaning is essential before drinking, and a second clean one week later may be needed.

Should a tank unused for months be tested for leaks before we clean it?

Yes. An unused tank may seep silently, insects may have entered, and silt may accumulate from continuous moisture. Full inspection is essential before cleaning.

After seasonal rain the water is silty and smells like earth. Normal?

Yes. Wadi Uranah carries heavy silt after rain. Clean the tank one week after heavy rain, you may need a second wash to clear it fully.

Should we clean the tank before we move in, or wait until we use it?

Clean immediately before occupancy, even if the tank looks new and empty. Moisture and mould start growing rapidly in an unused scheme.

The tank is brand new and has never been filled. Does it need cleaning before the first fill?

Yes. Even an empty new tank needs cleaning before first fill. Moisture and dust settle inside from air and foundation dampness.

Are new tanks in slowly building zones more prone to mould than in occupied areas?

Yes. High moisture, irregular use and construction delay encourage mould and bacteria far faster than in settled occupied neighbourhoods.

How much does water tank cleaning in Al Mudaa Al Jadid 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 Mudaa Al Jadid.