Underground tank leak detection for duplexes in Al Andls, Riyadh

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

Why underground tank leak detection differs in Al Andls

The centre of Al Andls is at 24.7446, 46.7827, about 11.4 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 centre of Al Andls sits about 606 m above sea level (SRTM open elevation data).

Main roads in or near Al Andls: Khalid bin Al Walid Street, Prince Bandar bin Abdulaziz Road.

Wondering whether the old tank under your duplex in Al Andls, Riyadh, could be leaking without anyone noticing? It is a fair question. Al Andls sits at 24.7446, 46.7827, about 11.4 km from the centre of Riyadh, with an approximate radius of 1.2 km, and the centre of the district sits about 606 m above sea level. Those details matter less than the tank itself, because underground tanks corrode slowly and rarely announce a fault. A leak detection visit is the practical way to find out whether your tank is losing product before the problem reaches the soil or your water supply.

The inspection follows a set sequence. The technician first reviews the tank's age, its material and any past repairs, then checks the fill and vent lines and the dispensing equipment for signs of wear. Where the tank can be accessed, the internal condition is assessed, and where the surface needs protection, interior coating is quoted at SAR 25–70 per m², so the final cost depends on the measured area. The findings are then written up clearly, with the recommended repairs listed in priority order so you can decide what to act on first and what can wait.

Before the visit, gather a few things that will speed the work up. Find any previous installation papers, maintenance records and repair invoices, and note any recent changes in fuel or water consumption that you have seen on your bills. Clear access to the tank cover, the fill point and the vent pipe, and let tenants in both halves of the duplex know when the visit will happen so that nobody is caught off guard. Having this information ready means the inspection can focus on the tank rather than on searching for paperwork, and it gives you a clearer picture of what the findings mean for your property.

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

Signs that call for underground tank leak detection

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

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

Causes we see in the field

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

Tools and methods, and when we use them

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 Andls

Short answers for Al Andls

Common mistakes we see

• 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.