Underground tank leak detection for villas in Al Adl, Jeddah

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

Before we start: what we know about Al Adl

The centre of Al Adl is at 21.4461, 39.2907, about 16.3 km from the centre of Jeddah, with an approximate radius of 1.2 km. The approximate area shown on the map is centred here. The centre of Al Adl sits about 58 m above sea level (SRTM open elevation data).

Al Adl is about 11 km from the sea coast (OpenStreetMap). Main roads in or near Al Adl: Haramain Road, Jeddah–Makkah Expressway, Old Makkah Road.

Underground water and fuel tanks in villas often fail quietly. The most common problem is a slow leak at a joint, fitting or wall that nobody notices until the level drops or the surrounding soil becomes damp. Villas in this part of Jeddah rely on storage tanks buried in the garden or beside the driveway, so a small loss can go unseen for a long time. Leak detection for this property type starts with checking the tank's walls, inlet and outlet pipework, and the connections to the pump, because these are where most failures begin.

The local setting shapes how the work is done. Al Adl sits at the centre of about 21.4461, 39.2907, roughly 16.3 km from the centre of Jeddah, and covers an approximate radius of 1.2 km. Its centre lies about 58 m above sea level, and the coast is about 11 km away. Because the area is set back from the sea, the technician will still consider how the ground around the tank behaves, but the focus stays on the tank itself. Tank internal coating, where it is needed after repair, is priced at SAR 25–65 per m², so the extent of any damage affects the final scope. Access routes around the villa are also checked first, since many tanks sit close to walls, paving and vehicle areas.

Before the visit, ask what method will be used to find the leak and whether it can be done without draining the whole tank. Ask whether the inspection covers the pipework and pump connections as well as the tank body, and whether the results will be explained in writing. Confirm how the coating quote is calculated, using the total area in square metres, so that you understand the cost before any work begins. It also helps to note when you first saw the water level drop or noticed damp soil, as this guides where the technician looks first.

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

Signs worth paying attention to

These are the signs most often linked to underground tank leak detection:

• 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

Causes we see in the field

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

Tools we use in Al Adl

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.

Al Adl in facts and sources

Common questions about underground tank leak detection in Al Adl

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.