Underground tank leak detection for duplexes in Al Mrqb, Riyadh

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

Underground tank leak detection in Al Mrqb: the local context

The centre of Al Mrqb is at 24.6359, 46.7239, about 9.9 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. The centre of Al Mrqb sits about 593 m above sea level (SRTM open elevation data).

Main roads in or near Al Mrqb: Madinah Road, Abdulaziz bin Musaed bin Jalawi Street, Al Batha.

Is there a way to tell whether the underground tank beneath your duplex in Al Mrqb is leaking before the damp, the odd smell or the falling water pressure becomes a serious problem? Yes, and the first step is a proper inspection rather than guesswork. Al Mrqb sits at 24.6359, 46.7239, about 9.9 km from the centre of Riyadh, with an approximate radius of 1.2 km, so the neighbourhood is compact and the same local conditions tend to affect the buildings around you. The centre of Al Mrqb sits about 593 m above sea level, which is a useful reminder that ground conditions here are specific to this area, so a check should reflect the site itself rather than general assumptions.

Our inspection for a duplex starts with a review of the tank's age, its location relative to the building and the water usage pattern of both units. The technician then tests the tank and the connecting lines for loss of water, checks the level over a set period and looks for signs of seepage in the surrounding ground and walls. Where the tank lining has deteriorated, the report will note the affected surface area, and internal coating is priced at SAR 25–70 per m², so you can see what a repair would involve before any work is agreed. Every finding is explained in plain language, and you are never asked to commit to work on the day of the visit.

Before the visit, gather a few details that make the inspection faster and more accurate. Note when you first noticed a change in water pressure or any damp patch, and keep recent water bills for both units so the usage can be compared. Clear access to the tank cover and any valve chambers, and let the other duplex occupant know when the technician will arrive. If you have the original installation drawings or the date the tank was built, have them ready. With these to hand, the inspection can focus on the real question: whether your tank is losing water, and what to do about it.

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

Signs worth paying attention to

The following signs are worth checking before they grow:

• 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 most common causes

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

How we choose the tool in Al Mrqb

The steps in order

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 Mrqb

Common questions about underground tank leak detection in Al Mrqb

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 receive

The written output: the written level-test result and the recommended next step. The report is numbered and can be checked with its verification code.