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

Water tank cleaning in Al Rayyan Jeddah

Al Rayyan is a new apartment district east of the Haramain expressway between the air base bridge and Al Kawthar. The Al Thuraya and Al Sultan schemes make up most of it, with wide internal streets and sewerage and drainage work still incomplete. Tanks serve occupied blocks and vacant plots around the neighbourhood, and silt from the excavations enters the 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 Al Rayyan

The water table here is very high and the soil is always damp. Tanks sit under high groundwater pressure and the incoming water carries much more silt and clay than in established neighbourhoods. The method is set out in full on what Water tank cleaning involves.

The first reason

Active excavations fill tanks with silt

Sewerage and foundation work digs into damp soil, groundwater enters tanks rapidly carrying earth and sand from the sites. Sediment loads grow much faster than in completed areas.

The second reason

Incomplete drainage networks raise water table

Drainage is still being laid through the fringe, so soil around tanks stays very wet. Stagnant groundwater pushes into the tank under high pressure.

The third reason

Tanks sit in low ground between seasonal wadis

Seasonal wadis run very close, and heavy rain raises the groundwater table fast. Tanks receive water under high pressure because of the groundwater elevation.

Landmarks of Al Rayyan

Al Rayyan is located east of the Air Base Bridge between Al Thuraya Scheme and Al Sultan Scheme, with tanks situated on occupied building rooftops or on vacant plots still under development. They are reached from the wide internal streets or via Al Rayyan Health Centre.

Air Base Bridge
Al Thuraya Scheme
Al Sultan Scheme
Al Rayyan Health Centre
Uqbah ibn Nafi Mosque

Before treatment

The condition of the tank decides the method

A newly built district east of the expressway with apartment blocks, villas and land still under development. Drainage networks are incomplete and the soil stays damp from high groundwater.

Fine brown sediment beneath shallow water

The layer on the floor

The floor layer is thick with silt and sand from nearby excavations and minerals from the mineral-rich groundwater.

Light and algae

Algae and bacteria grow rapidly in nutrient-rich groundwater, especially in tanks with daylight exposure.

A damp concrete wall carrying a dark deposit

The deposit on the wall

The wall deposit is dark from iron oxide and clay, a heavy precipitation from the groundwater minerals.

A concrete surface with a fine hairline crack

The lining and hairline cracks

Hairline cracks form from high external groundwater pressure pushing on the tank shell, especially in buried tanks.

The lid of a water tank on a building roof

The lid and the access hatch

The lid and access hatch stay damp from groundwater seepage, requiring regular cleaning of mould and moisture.

A plastic pipe leaving the exterior wall of a building

The vent and the overflow pipe

The vent becomes blocked by moisture and silt and must be gently cleared from inside to restore air flow.

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 Briman Sub-Municipality

Briman sub-municipality sits east of the Haramain expressway on Jeddah's north eastern edge. Its older quarters are planned grids of villas and walk-up flats, while the outer districts are new subdivisions still being built out. Seasonal wadis such as Wadi Umm Hablain and Wadi Al Asla cross the area, groundwater runs high in places, and drainage networks in the newer districts are incomplete, so soil around foundations stays damp. Vacant plots, live building sites and constant dust give crawling insects and rodents easy routes into homes, and the food outlets along the main arteries keep them supplied.

Questions about this district

Why is the water a darker colour here than in other Jeddah neighbourhoods?

Nearby groundwater carries clay and minerals that tint the water. Regular tank cleaning removes this discolouration.

Is the local groundwater contaminated by sewage or drains?

Groundwater requires testing and analysis to determine its source and purity. Building work affects the quality of local groundwater supply.

After heavy rain the water turns very cloudy. Is this normal?

Yes, rain raises the groundwater level fast, so the tank receives water heavily laden with silt. Cleaning after heavy downpours is necessary.

Do tanks here leak more than in other districts?

Yes, high groundwater pressure and damp soil increase the risk of seepage from the tank base and lower walls.

Do we need the tank cleaned more often here than in finished neighbourhoods?

Yes, three times yearly is recommended because groundwater mineral and silt deposits accumulate very quickly.

Do the vacant plots around the district affect the water quality in our flat?

Vacant land and neighbouring excavations raise the moisture level around tanks, increasing the water pressure and pushing more groundwater into the system.

How much does water tank cleaning in Al Rayyan 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 Rayyan.