Underground tank leak detection for apartments in Al Ajwad, Jeddah

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

Before we start: what we know about Al Ajwad

The centre of Al Ajwad is at 21.6033, 39.2577, about 11 km from the centre of Jeddah, with an approximate radius of 2 km. The service-area circle on the map below is drawn from this point. Main roads in or near Al Ajwad: Hadi Al-Sham Road.

Al Ajwad is about 13 km from the sea coast (OpenStreetMap). Al Ajwad has both villas and apartment buildings.

The centre of Al Ajwad sits about 61 m above sea level (SRTM open elevation data).

Picture the owner of an apartment building in Al Ajwad who rarely thinks about what lies beneath the car park or garden. Water bills rise a little each month, the pump runs longer than it used to, and a damp patch appears near the ground floor wall. Nobody in the building has seen the underground tank, so the cause stays unclear. For owners and tenants alike, a hidden leak is easy to miss until it becomes expensive.

Al Ajwad is a mixed neighbourhood of villas and apartment buildings, with its centre at 21.6033, 39.2577, roughly 11 km from the centre of Jeddah. Its centre sits about 61 m above sea level, and the coast lies about 13 km away. For a residential building, these facts matter because many apartment blocks here depend on stored water in underground tanks and pumps, so a leak can go unnoticed for longer than it would in a single-house setting. Because the area mixes building types, owners should not assume that a neighbour's experience applies to their own tank, and each building needs its own check.

If you manage or own an apartment building in Al Ajwad, start by recording your monthly water consumption and noting any unexplained rise. Next, ask the building manager or the pump operator to check the tank level over a quiet period and compare readings, then inspect the ground around the tank and the walls nearby for damp or soft soil. Once a leak is suspected, arrange a detection survey before any digging begins, so the repair is aimed at the right spot. If the tank walls are found to be weakened, obtain a written quote for internal coating, which is priced at SAR 25–65 per m², and ask the contractor to explain how the area was measured. Keep all reports together so future owners and tenants can see the tank's history.

In apartment buildings, the floor below is often where a leak shows first.

Signs worth paying attention to

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

• A noticeable drop in the water level overnight
• The pump runs for longer periods
• The tank needs refilling faster than usual

Causes we see in the field

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

Tools we use in Al Ajwad

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 Ajwad

Common questions about underground tank leak detection in Al Ajwad

What we advise against

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

What you get after the work

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.