Underground tank leak detection for duplexes in Al Nsym Al Shrqy, Riyadh

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

Before we start: what we know about Al Nsym Al Shrqy

The centre of Al Nsym Al Shrqy is at 24.7378, 46.8406, about 16.9 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 1.5 km from the centre of Al Nsym Al Shrqy (OpenStreetMap).

The centre of Al Nsym Al Shrqy sits about 581 m above sea level (SRTM open elevation data). Main roads in or near Al Nsym Al Shrqy: Abu Hurairah Street, Abu al-Aswad al-Du'ali Street, Prince Ahmed bin Salman bin Abdulaziz Street.

Underground tank leak detection for duplexes in Al Nsym Al Shrqy starts with the location itself. The centre of Al Nsym Al Shrqy sits at 24.7378, 46.8406, about 16.9 km from the centre of Riyadh, with an approximate radius of 1.2 km, so most duplex buildings here are served by the same local conditions. The area sits about 581 m above sea level, according to SRTM open elevation data, and the nearest wadi channel is about 1.5 km from the centre, as recorded in OpenStreetMap. Because of this drainage nearby, the first check on any tank is whether ground water or surface runoff could be reaching the tank walls or the fill point, since both can hide a small leak or mimic one in the readings.

Several things cannot be settled from a desk review and are left to the site visit. The technician will walk the plot, look at the age and material of each tank, inspect the fill and vent lines, and check whether the tank has been coated internally. If recoating is needed, the quoted range is SAR 25–70 per m², and the exact figure depends on the tank surface measured on site, not on this page. The technician will also confirm the depth of cover, the condition of any access chamber, and whether a previous repair has altered the original pipework. None of these can be judged from the map alone, so they are recorded on the day.

To help the technician, the household should prepare a short record before the visit. Note the date of the last tank fill, any unexplained fall in fuel level, any damp patches or stains near the tank, and whether the duplex shares its tank with a neighbouring unit. Mention the wadi side of the property if it is closer to the tank than the main road. Keep any earlier inspection papers or coating records. A clear note of these points lets the technician test the most likely leak paths first and keeps the visit focused on the tank rather than on the wider plot.

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

Signs that call for underground tank leak detection

The following signs are worth checking before they grow:

• Damp or salt marks on the tiles above the tank
• The tank needs refilling faster than usual
• The pump runs for longer periods

The most common causes

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

Tools we use in Al Nsym Al Shrqy

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 Nsym Al Shrqy

Questions from Al Nsym Al Shrqy

Common mistakes we see

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

The written outputs

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.