Underground tank leak detection for duplexes in Al Fwta, Riyadh

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

What is specific about Al Fwta for underground tank leak detection

The centre of Al Fwta is at 24.6417, 46.7105, about 8.8 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. The centre of Al Fwta sits about 588 m above sea level (SRTM open elevation data).

Main roads in or near Al Fwta: King Fahd Road, Abdulaziz bin Musaed bin Jalawi Street, King Fahd Sub Road.

Al Fwta sits at roughly 24.6417 north, 46.7105 east, about 8.8 km from the centre of Riyadh, and the built-up area spans an approximate radius of 1.2 km. That compact footprint matters for underground tank work. Crews can reach most duplex properties within a short drive of one another, which keeps scheduling simple and means a technician can cover several addresses in a single visit. Because the area is close to the city yet not part of its dense core, owners often have tanks installed at different times, so a leak check should begin by confirming the tank's age, material and location before any testing starts.

The centre of Al Fwta lies about 588 m above sea level, according to SRTM open elevation data. In practical terms, ground in this part of Riyadh is relatively flat and the water table and soil conditions can change over short distances. We therefore plan each survey around the individual plot rather than assuming that neighbouring tanks behave the same way. Elevation also affects how groundwater and surface runoff move around a tank, so technicians check drainage paths and access points on site. Where a tank has an internal coating, its condition is judged directly, since tank internal coating (per m²) is priced at SAR 25–70 per m², and the actual cost depends on the surface area that needs work.

Owners in Al Fwta frequently make the same avoidable errors. The most common is waiting for a visible puddle or a strong fuel smell before arranging a check, when small losses may already have spread into the soil. Another is asking for a coating repair without first confirming the source of the leak, which can leave the real problem untouched. Some owners also delay the check until a sale or tenancy change, by which point a fault may have been running for a long time. Finally, many people overlook records: keeping the installation date, past repairs and any fuel delivery discrepancies makes the diagnosis faster and more accurate. Raising these points early keeps the work focused and the results reliable.

In a duplex, the two floors often share lines, so tests are done floor by floor.

Signs worth paying attention to

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

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

The most common causes

• Construction joints and corners.
• Cracks in the concrete tank walls or floor — we check this before anything else.
• A common cause: a float valve that does not close, so water is wasted.

Tools we use in Al Fwta

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.

Facts and costs — Al Fwta

Questions from Al Fwta

What we advise against

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

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.