Underground tank leak detection for residential buildings in Al Ymama, Riyadh

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Underground tank leak detection in Al Ymama: the local context

The centre of Al Ymama is at 24.5940, 46.7161, about 13.9 km from the centre of Riyadh, with an approximate radius of 1.2 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Ymama: South Ring Road, South Ring Road, King Fahd Sub Road.

The nearest wadi channel is about 1 km from the centre of Al Ymama (OpenStreetMap). The centre of Al Ymama sits about 586 m above sea level (SRTM open elevation data).

Underground water tanks in residential buildings most often fail through slow leaks that go unnoticed for months. The common signs are a water bill that rises without a clear reason, damp patches on basement or ground-floor walls, a pump that runs longer than usual, or a faint smell near the tank room. By the time the water level drops noticeably, the leak has usually been working for some time, so early checks matter more than people expect.

Al Ymama sits at 24.5940, 46.7161, about 13.9 km from the centre of Riyadh, with an approximate radius of 1.2 km. Its centre is about 586 m above sea level, and the nearest wadi channel runs about 1 km from the centre. These facts shape the approach. Ground that slopes toward drainage channels can carry water under building foundations after rain, which can make tank walls and joints work harder and hide leaks in soil that stays damp. Because the wadi is close, inspectors should look at how surface runoff moves around the plot as well as inside the tank itself. A tank that looks dry on the surface may still be losing water to wet ground nearby.

Before booking a visit, ask the provider how they will test the tank rather than only look at it. A sound method checks the water level over a set period with the pump off, inspects the internal walls and floor, and reviews the pipe connections and overflow line. Ask whether the internal coating will be assessed and, if repair is needed, how the work is priced per square metre. Coating repair is typically quoted at SAR 25–70 per m², so a clear written estimate that states the area measured and the coating type is worth requesting. Finally, ask what the report will contain, and whether it will note the site's location relative to the nearby wadi.

For a residential building, shared risers, tanks and pumps are checked as one system.

When do you need underground tank leak detection?

If you notice one of these signs in Al Ymama, it is a good moment to talk to the team:

• The pump runs for longer periods
• A noticeable drop in the water level overnight
• Damp or salt marks on the tiles above the tank
• The tank needs refilling faster than usual

Causes we see in the field

• A float valve that does not close, so water is wasted.
• Cracks in the concrete tank walls or floor.
• Construction joints and corners.

Tools we use in Al Ymama

How the work is done, step by step

1. Safety first: Tank lids and confined spaces are handled with ventilation and a second person on site.
2. Documented level test: Filling and use are stopped and the level is recorded against time.
3. Isolating the tank from the network: This tells us whether the loss is from the tank body or from the supply line.
4. Checking the body and connections: Inlet, outlet and overflow connections are inspected.
5. Recommendation: You get the next step in writing: repair, waterproofing or a line test.

Quick comparison: facts and costs in Al Ymama

Questions from Al Ymama

Mistakes that cost more

• Ignoring the float valve
• Waterproofing the tank before confirming the loss is from the tank and not the line

What you get after the work

You receive: the written level-test result and the recommended next step, in a technical report with a verification code.