Underground tank leak detection for duplexes in Khobar

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

Before we start: what we know about Khobar

Khobar is about 1.8 km from the sea coast (OpenStreetMap). The centre of Khobar sits about 9 m above sea level (SRTM open elevation data).

Team note on Khobar: Kashf teams serve this city and its nearby districts with the same documented inspection standard: device-based leak detection without demolition, a written report, and a clear scope before any work begins..

Underground tanks at duplexes in Khobar most often fail through slow leaks that go unnoticed for a long time. Water tables in coastal areas can change over the year, and a tank that has been buried for years may show a small loss at the joints, the fittings or along the wall. Because the leak is usually gradual, residents tend to notice it only when the water bill rises, when there is a damp patch in the garden, or when the pump runs more often than it should. A proper check looks for the source of the loss rather than just topping up the tank.

Khobar sits about 9 m above sea level at its centre, and the town is about 1.8 km from the coast. This means a tank here is never far from groundwater influenced by the sea, and that changes the approach. Technicians pay attention to whether the surrounding soil is wet, whether there is any sign of salt residue on fittings, and whether the water level in the tank shifts in a way that matches the tide rather than household use. For a duplex sharing one tank or two separate tanks on one plot, the inspection needs to separate the two households' usage so the source of any loss is traced correctly. If the tank wall itself is worn, the repair may involve an internal coating, which is priced at SAR 25–60 per m², so the size of the tank drives the cost.

Before the visit, ask the provider how they will tell a tank leak from a supply-line leak, and whether they will test the tank with the pump switched off. Ask whether they will check the fittings near the coast-influenced soil, and how they will record the findings so both owners can see them. Confirm whether the quote covers the tank surface area for an internal coating, and what access the team will need to the plot and the tank lid. A clear answer on these points shows the provider understands the local conditions before any work begins.

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

Signs worth paying attention to

The following signs are worth checking before they grow:

• Damp or salt marks on the tiles above the tank
• The tank needs refilling faster than usual
• The pump runs for longer periods

Causes we see in the field

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

How we choose the tool in Khobar

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 Khobar

Common questions about underground tank leak detection in Khobar

Common mistakes we see

• 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.