Underground tank leak detection for duplexes in Al Rbwa, Riyadh

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

Underground tank leak detection in Al Rbwa: the local context

The centre of Al Rbwa is at 24.6934, 46.7589, about 8.7 km from the centre of Riyadh, with an approximate radius of 3.3 km. The approximate area shown on the map is centred here. Main roads in or near Al Rbwa: Eastern Ring Road, Makkah Road, Kharis Road.

The centre of Al Rbwa sits about 639 m above sea level (SRTM open elevation data).

Picture a duplex owner in Al Rbwa who notices that the water bill has crept up for no clear reason, or that the ground near the back wall stays damp after the rest of the yard has dried. Underground water tanks sit out of sight, so a slow leak can run for a long time before anyone sees a sign. For a family sharing a building with another household, a hidden loss also raises the question of who pays, which is why it is worth checking early and calmly rather than waiting for a visible problem.

Al Rbwa's centre lies at 24.6934, 46.7589, about 8.7 km from the centre of Riyadh, with an approximate radius of 3.3 km. That means the neighbourhood is close enough to the city core that many duplexes share older utility layouts, while still being a distinct local area with its own building stock. The centre sits about 639 m above sea level, so buildings here are on a plateau-level site rather than in a low basin. For a duplex owner, the practical point is that tank checks should follow the actual layout of your plot and your shared pipework, not a generic template. Coating costs also matter when a repair is considered: tank internal coating is priced at SAR 25–70 per m², so the size of the tank surface you need to cover directly shapes the budget, and this is worth knowing before you request quotes.

Start by confirming which tank serves which unit and where the shared lines run, so the inspection covers every connection. Next, record your current meter readings over a set period and compare them to your normal use, noting any sudden rise. Then arrange an inspection of the tank walls, floor and joints, and ask for the surface area so the coating estimate can be checked against the per-m² range. Once the findings are clear, agree on how the cost will be split between the households and put the decision in writing. Finally, schedule a repeat check after any repair to confirm the level holds steady over the following weeks.

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

When do you need underground tank leak detection?

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

• The pump runs for longer periods
• A noticeable drop in the water level overnight
• Damp or salt marks on the tiles above the tank

Where the problem usually comes from

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

Tools and methods, and when we use them

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.

Quick comparison: facts and costs in Al Rbwa

Questions from Al Rbwa

What we advise against

• 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.