Underground tank leak detection for duplexes in Al Rfyaa, Riyadh

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

Before we start: what we know about Al Rfyaa

The centre of Al Rfyaa is at 24.6399, 46.6616, about 8.3 km from the centre of Riyadh, with an approximate radius of 1.2 km. The service-area circle on the map below is drawn from this point. The centre of Al Rfyaa sits about 618 m above sea level (SRTM open elevation data).

The nearest wadi channel is about 0.8 km from the centre of Al Rfyaa (OpenStreetMap). Main roads in or near Al Rfyaa: Prince Faisal bin Fahd bin Abdulaziz Road, Prince Talal bin Abdulaziz Road, Prince Sattam bin Abdulaziz Road.

Is there a way to know if the underground water tank under your duplex is leaking before the damage shows up in your walls? In Al Rfyaa, a neighbourhood centred at 24.6399, 46.6616 and roughly 8.3 km from the centre of Riyadh, many duplex owners only notice a problem when damp patches appear or the water bill rises without explanation. Because the area sits about 618 m above sea level and has a wadi channel roughly 0.8 km from the centre, ground conditions around buried tanks can shift, so a proper check is worth scheduling rather than waiting for visible signs.

The inspection begins with a visual and functional review of the tank and its surroundings, looking at the walls, joints and the area around the access points for signs of seepage. The technician then checks the water level and the connections to the supply and overflow lines to see whether the readings match normal use. Where the interior shows wear, the internal coating is assessed, and the cost of recoating is usually quoted per square metre at SAR 25–70 per m², depending on the condition and the surface involved. Each step is recorded so you can see exactly what was found and what, if anything, needs attention.

Before the visit, gather the records you have for the tank, including the date of the last cleaning or repair and any past plumbing work on the building. Note any changes you have seen, such as a drop in water pressure, unusual wet spots in the courtyard, or a sudden increase in your water consumption, and write down when they started. Clear access to the tank cover and the pump area so the technician can work without delay. Having these details ready helps the inspection focus on the right places and gives you a clear picture of the tank’s condition afterwards.

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 Rfyaa, it is a good moment to talk to the team:

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

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.

Al Rfyaa in facts and sources

Common questions about underground tank leak detection in Al Rfyaa

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 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.