Hidden water leak detection in Al Mrwa, Jeddah: before summer & rain season

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

Why hidden water leak detection differs in Al Mrwa

The centre of Al Mrwa is at 21.6171, 39.2025, about 8.8 km from the centre of Jeddah, with an approximate radius of 2.8 km. The approximate area shown on the map is centred here. Al Mrwa is about 9.9 km from the sea coast (OpenStreetMap).

The centre of Al Mrwa sits about 27 m above sea level (SRTM open elevation data). Main roads in or near Al Mrwa: Haramain Road, Prince Ahmad bin Abdulaziz Road, Hadaa Al Sham Road.

Al Mrwa sits at 21.6171, 39.2025, roughly 8.8 km from the centre of Jeddah, and its built area spreads across an approximate radius of 2.8 km. That makes it a neighbourhood where many homes sit a fair distance from the commercial core, so a hidden leak in one building is often only found after the water bill or a damp patch has already appeared. Our leak detection visits here are planned around that spread, with the team travelling from the nearest service point and scheduling inspections so that several properties in the same cluster can be checked in one route.

The centre of Al Mrwa lies about 27 m above sea level, according to SRTM open elevation data, and the area is about 9.9 km from the sea coast. A modest elevation and a distance of nearly ten kilometres from the coast mean that rooftop and ground-level storage tanks are relied on for steady supply, and the sea air is not as heavy a factor as it is closer to the shoreline. In practice, this means our technicians pay close attention to tank walls, overflow pipes and the joints between the tank and the distribution lines, because those are the points where pressure and movement tend to show a leak first. Where a tank is found to be losing water through its walls, we explain the options for internal coating, with costs quoted per square metre at SAR 25–65 per m², depending on the surface and the condition of the tank.

Before the summer heat arrives, owners in Al Mrwa often make a few avoidable errors. Many wait for a visible puddle or a sudden rise in the water meter reading, when a slow leak has been running for weeks behind a wall or under a floor. Others repair the one spot they can see and ignore the rest of the line, or they book a general plumber without asking for a pressure test and a written record of what was checked. Some also delay tank inspection until the coating is badly flaking, which makes the eventual repair larger and more costly. Scheduling a survey early, while temperatures are still moderate, gives the most reliable picture of what is happening inside the property.

Checks before summer and before the rain season catch problems while they are still small.

Signs that call for hidden water leak detection

The following signs are worth checking before they grow:

• The meter keeps turning with every tap closed
• A water bill higher than usual with no change in use
• A damp patch that slowly grows on a wall or ceiling

Causes we see in the field

• A corroded joint inside a wall — we check this before anything else.
• A common cause: a cracked pipe under floor tiles.
• A common cause: a hot line that expands and contracts with use.

Tools and methods, and when we use them

From the first visit to the report

1. Meter test: We stop all use and watch the meter to confirm whether water is actually being lost.
2. Line isolation: We close valves one line at a time to see which line loses pressure.
3. Acoustic listening: We follow the sound of water escaping under pressure and compare its strength between points.
4. Thermal imaging and moisture mapping: We map how far the wet area spreads behind paint and tiles.
5. Documentation: Readings, photos and the likely position go into a written report.

Quick comparison: facts and costs in Al Mrwa

Common questions about hidden water leak detection in Al Mrwa

What we advise against

• Repainting the stain while the moisture keeps coming back
• Breaking tiles at random before the line is identified

What you get after the work

The written output: a technical report with the readings, the likely leak position and a confidence level. The report is numbered and can be checked with its verification code.