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Pool Leak Detection Cape Town

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  • Pool Leak Detection Cape Town

If your pool is dropping more than a couple of centimetres a week, it is almost certainly not the weather. Kwik Pools does pool leak detection across Cape Town — we pressure-test the plumbing and test the shell to find exactly where the water is going, before anything gets dug up or drained.

  • Same weekResponse across the metro
  • No diggingUntil the leak is located
  • 30+Pool services in-house
  • FreeOn-site assessment
Swimming pool with a dropped water level showing a stained tide line above the waterline tiles at a Cape Town home
A tide line above the waterline tiles is usually the first sign a pool is losing more than evaporation.

Signs your pool is leaking, not evaporating

  • Losing more than 2cm a week

    In a Cape Town summer, evaporation accounts for roughly a centimetre or two a week. Consistently more than that points at a leak.

  • The municipal bill jumped

    A pinhole in a pressure line can push thousands of litres a month. The water bill is often the first real clue.

  • A patch that never dries

    Soft ground, lush grass or damp paving on the run between the pool and the pump usually means a buried pipe has failed.

  • The pump keeps losing prime

    Air being drawn into the suction side means a crack or failed joint somewhere before the pump.

  • The level stops at one point

    Water only falls to the level of the leak. Stopping at the weir mouth is a classic cracked-weir signature.

  • Cracks or lifting tiles

    Movement in the shell shows up at the waterline first, and what lifts a tile will usually let water out too.

Try this first: mark the water level with tape and leave the pool for 24 hours with the pump off, then repeat with the pump running. Losing more with the pump on points at the pressure side; losing it either way points at the shell or a gravity line. Send us both readings and we can usually narrow it down before we arrive.

Where pools actually leak

After years on Cape Town pools, the same five places account for most of the water loss we find. Knowing which one it is changes the repair completely, which is why we test rather than guess.

Diagram showing the five most common swimming pool leak points: skimmer weir, suction pipe, return line, light niche and floor crack
The five most common leak points we find on Cape Town pools.
  • The skimmer or weir

    Plastic bonded into a concrete shell, flexing for thirty years. The joint eventually opens. Very common, easily missed.

  • Suction and return lines

    Buried pipework that has gone brittle with age, or a joint pulled apart by ground movement.

  • The light niche

    The conduit behind a pool light is a direct path out of the shell and is rarely suspected.

  • Structural cracks

    Cracks in the floor or walls that move with the seasons and let water out steadily.

  • Fittings and returns

    Over-tightened or perished fittings where the plumbing enters the shell.

  • More than one

    On older pools it is often two small leaks, not one big one. We test everything before quoting.

Not sure if it is a leak or the weather?

Send us a photo of your pool and the water level on WhatsApp. We will tell you what we think it is before anyone comes out.

How we find your leak

Technician pressure testing swimming pool plumbing with a gauge manifold attached to the PVC pipework at the pump station

We isolate and pressure-test each line separately, then dye-test the shell and fittings with the water still in the pool. That tells us which line has failed and roughly where, so the repair is one targeted excavation instead of lifting a whole patio on a hunch.

You get a clear answer on what is leaking, what it will take to fix, and what it is going to cost before any work starts.

  1. We listen to the symptoms

    How fast it drops, whether the pump changes it, where the level settles. This alone rules a lot out.

  2. Pressure test the plumbing

    Each suction and return line is isolated and tested so a failed line is identified, not assumed.

  3. Test the shell and fittings

    Dye testing around the weir, lights, returns and any cracking, with the pool still full.

  4. You get the findings and a quote

    We show you what we found and quote the repair properly. No work starts before you agree.

  5. We fix it

    Small plumbing repairs are often done the same day. Bigger shell work gets scheduled and quoted in writing.

What we repair once we find it

  • Cracked and collapsed underground pipes
  • Suction and return line repairs
  • Cracked and leaking weirs and skimmers
  • Leaking light niches and conduits
  • Structural cracks in the shell
  • Perished and failed fittings
  • Full re-piping on older pools
  • Resurfacing where the finish has gone

A cracked weir is the one people miss

It is the single most common leak we find, and the easiest to identify once you know the sign: the pool drops to the bottom of the weir mouth and then holds steady. Water only ever falls to the level of the leak.

Some weirs can be sealed properly and will hold for years. Others have gone brittle enough that a repair is a short-term fix — and we will tell you honestly which one you have rather than selling you a replacement you do not need.

Close-up of a cracked swimming pool skimmer weir where the plastic housing meets the pool shell, a common cause of water loss

Pool leak detection across Cape Town

We work the whole metro from our Plattekloof base — the Northern Suburbs, Southern Suburbs, Atlantic Seaboard, City Bowl, South Peninsula, Helderberg, West Coast and the Cape Winelands. Buying a home? Pair this with a pool inspection so you know the pool properly before you sign.

Restored Cape Town swimming pool with clear blue water, new marbelite surface and mosaic waterline tiles, holding its level
Leak found, repaired and the pool holding its level again.

Get your leak found this week

Free on-site assessment and no call-out fee. We test properly, show you what we found, then quote.

Questions we get about pool leaks

How do I know if it is a leak or just evaporation?

Mark the level and watch it for a week with the pump off. Losing more than a centimetre or two, or losing it noticeably faster with the pump running, points at a leak rather than the weather.

Do you have to drain the pool to find a leak?

Almost never to find it. We pressure-test the plumbing and dye-test the shell with the water still in. Draining only comes into it for certain structural repairs.

How much water can a small leak lose?

More than people expect. A pinhole in a pressure line can run thousands of litres a month, which is why the municipal bill is often the first thing that gives it away.

Can you repair the leak once you find it?

Yes. Small plumbing repairs are often sorted the same day, and shell leaks get quoted properly once we can show you exactly what we found.

Do you charge for the assessment?

The on-site assessment is free and there is no call-out fee. You get our findings and a written quote before any work is agreed.

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