Underground tank leak detection for villas in Al Hndawya, Jeddah

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

Underground tank leak detection in Al Hndawya: the local context

The centre of Al Hndawya is at 21.4731, 39.1845, about 7.9 km from the centre of Jeddah, with an approximate radius of 1.2 km. The service-area circle on the map below is drawn from this point. Al Hndawya is about 1.1 km from the sea coast (OpenStreetMap).

The centre of Al Hndawya sits about 12 m above sea level (SRTM open elevation data). Main roads in or near Al Hndawya: King Fahd Road, Al Falah Road, Al Andalus Road.

The most common problem we see in villas across Al Hndawya is a slow loss of water from an underground tank that owners only notice when the pump runs more often than usual or the monthly bill climbs. Leaks in these tanks usually start at the joints, the inlet and outlet pipe entries, or cracks that open where the concrete walls meet the base. Because the tank is buried, the water can drain into the surrounding ground for months before any damp shows on the surface, so the first sign is often a damp patch near the wall or a pump that never seems to settle. A proper check looks at the tank itself, not just the pump, and tests whether the water level drops when all taps are closed.

Al Hndawya sits about 12 m above sea level and roughly 1.1 km from the sea coast, which matters for how we approach each job. Ground near the coast can carry more moisture and salt, so we pay close attention to the lower walls and the base seal, where salt-laden groundwater tends to press against the concrete. The centre of the area lies at 21.4731, 39.1845, about 7.9 km from the centre of Jeddah, so the same visit is often planned around the wider Jeddah routing rather than a single district. Where a leak is confirmed, the repair may involve internal coating, which is priced at SAR 25–65 per m², and the final figure depends on the tank's size and the condition of its surfaces.

Before the visit, ask the provider how they will test the tank, whether the test covers the full water level or only the pump area, and how long the inspection will take on site. Ask whether they will show you the water-level readings before and after the test, and whether they will explain which parts of the tank they checked. Confirm that the quote for any internal coating is given per square metre, so you can compare it fairly with other offers. Finally, ask what they will do if the leak is found outside the tank, in the pipework leading to it, since that changes the scope of the work and the cost.

Villas often have several lines and tanks; we test them one at a time so the cause is clear.

When do you need underground tank leak detection?

If you notice one of these signs in Al Hndawya, it is a good moment to talk to the team:

• 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

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

Tools we use in Al Hndawya

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 Hndawya in facts and sources

Common questions about underground tank leak detection in Al Hndawya

Mistakes that cost more

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

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.