Underground tank leak detection in Al Mrwa, Riyadh: cost & published offers

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

Underground tank leak detection in Al Mrwa: the local context

The centre of Al Mrwa is at 24.5387, 46.6741, about 19.4 km from the centre of Riyadh, with an approximate radius of 1.2 km. The approximate area shown on the map is centred here. Main roads in or near Al Mrwa: Al Sahra, Dirab Road, Ibn Taymiyyah Street.

The nearest wadi channel is about 2.8 km from the centre of Al Mrwa (OpenStreetMap). The centre of Al Mrwa sits about 652 m above sea level (SRTM open elevation data).

Underground fuel and water tanks in Al Mrwa most often show trouble as slow, hard-to-see leaks: a gradual drop in stored volume, damp soil near the fill pipe, or a sudden rise in pump-run time that nobody can explain. Corrosion at the tank shell, failed seals on fittings, and deteriorated internal coatings are the usual causes. Because the leak is underground, the first signs are often indirect, so a detection visit should look at records of tank levels and consumption as well as the physical condition of the tank and its pipework.

The local setting shapes how that inspection is planned. The centre of Al Mrwa sits at about 652 m above sea level, and its nearest wadi channel is about 2.8 km from the centre of the district, so surface water and seasonal runoff are worth considering when judging whether moisture around a tank has a natural source or points to a leak. The district lies roughly 19.4 km from the centre of Riyadh, with an approximate radius of 1.2 km, which means a visit is planned as a short local job rather than a city-centre dispatch. The coordinates of the district centre, 24.5387, 46.6741, can help when describing the site to a technician or when noting where the tank sits relative to access roads and neighbouring plots. Where a leak is confirmed, the repair route often includes internal coating work, which is quoted at SAR 25–65 per m², so the tank's surface area is a key figure to establish early.

Before booking a visit, ask the provider how they will test the tank and its lines, and whether the test will be done with the tank in service or after it is emptied. Ask what records they will need from you, such as fill logs, dispenser readings and any past repair invoices, and whether they will check the fill and vent fittings as well as the tank shell. Confirm the site address and the approximate position of the tank, and ask how the price is calculated, including whether the coating rate applies to the total internal surface area. A clear written scope before work starts will help you compare options and avoid surprises once the tank is open.

Prices shown on this page come from our own published price list for the city; the final price is set after inspection.

Signs that call for underground tank leak detection

The following signs are worth checking before they grow:

• 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

The most common causes

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

Tools and methods, and when we use them

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.

Al Mrwa in facts and sources

Questions from Al Mrwa

Common mistakes we see

• 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.