Underground tank leak detection in Al Ymama, Riyadh: without breaking

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 approximate area shown on the map is centred here. 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). Main roads in or near Al Ymama: South Ring Road, South Ring Road, King Fahd Sub Road.

Underground tank leak detection in Al Ymama, Riyadh, starts with the setting rather than the tank itself. The district centre sits at 24.5940, 46.7161, about 13.9 km from the centre of Riyadh, and the built-up area spans an approximate radius of 1.2 km. Because the ground here lies roughly 586 m above sea level, a technician will first look at how the site drains and where water is likely to collect around the tank pit. The nearest wadi channel is about 1 km from the centre of Al Ymama, so flood paths and seasonal runoff are reviewed early, since these affect soil moisture and can mask or mimic a slow leak in monitoring readings.

The detailed work is left to the site visit. The technician confirms the tank material, age, and condition of any existing internal coating, and decides which test method suits the tank and the pipework. Coating condition matters for the cost discussion: internal coating is quoted at SAR 25–65 per m², so the surface area of the tank is measured on site before any repair scope is agreed. The visit also covers access to fill points, dispensers, vent lines, and the monitoring well, and records any staining, odour, or wet ground that suggests where a leak may be coming from.

Information that helps the technician makes the visit faster and more accurate. Please have the tank capacity, installation date, and any previous test reports ready, along with a note of any recent changes in stock levels or unexplained losses. Tell us whether the site has had heavy rain or runoff recently, and point out any low areas near the tank. A simple sketch showing the tank, pipe runs, and the position of the nearest road or wall will help the technician plan the testing sequence and avoid unnecessary digging.

The aim is to locate the cause with instruments first, so any opening is limited to one point.

Signs worth paying attention to

These are the signs most often linked to underground tank leak detection:

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

The most common causes

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

How we choose the tool in Al Ymama

From the first visit to the report

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

Short answers for Al Ymama

What we advise against

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

The written outputs

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