Pool Leak Detection Erasmusrand

What a Leak Usually Turns Out to Be

In our experience across Pretoria East, roughly the same handful of causes account for most leaks: a cracked or loose skimmer throat, a failed light niche seal, a hairline structural crack from ground movement in older marbelite pools, or a slow underground leak on the suction or return line. Evaporation, on its own, accounts for a surprising number of “my pool is leaking” calls — Pretoria’s dry heat and wind can drop a pool level by several millimetres a day in peak summer, which feels alarming but is completely normal and not a fault with anything.

What Affects the Cost

We won’t quote a fixed leak detection price without seeing the pool, because the cost genuinely depends on a few things: how accessible the equipment and pipework are, whether the leak is in the shell or underground, how old the pool is, and whether previous repair attempts have made the fault harder to trace. What we can tell you is that a proper diagnostic visit — bucket test, visual inspection, and dye or pressure testing as needed — is far cheaper than paying to resurface or re-pipe a pool based on a guess that turns out to be wrong.

Signs You Might Have a Leak

• Topping up the pool more than once a week outside of peak summer heat.
• A patch of lawn or paving near the pool that stays damp for no obvious reason.
• The pump running longer than normal to maintain pressure.
• Cracked tiles or discoloured grout along the waterline.
• A noticeably higher municipal water bill with no other explanation.

Where We Do Leak Detection

We handle leak detection across Pretoria East, working out from our base in Erasmusrand — most often in Lynnwood, Waterkloof, Faerie Glen, Garsfontein and Moreleta Park, where a mix of older pools and reactive clay soil makes leaks more common than in newer developments.

Evaporation vs a Real Leak: A Rough Rule of Thumb

Pretoria’s summer heat, low humidity and wind mean some water loss from evaporation is completely normal — typically a few millimetres a day, more on hot, windy days, and noticeably more for pools with water features or heating running, since both increase evaporation. If your pool is losing water at a rate well beyond that — a noticeable drop overnight, or needing a top-up more than once or twice a week outside of the hottest stretch of summer — that’s a reasonable trigger to book a proper bucket test rather than keep assuming it’s just the weather.

Structural Leaks vs Plumbing Leaks vs Equipment Leaks

It helps to understand that “pool leak” actually covers three quite different problems, each with its own fix. A structural leak is a crack or failure in the pool shell itself — the marbelite or fibreglass surface — usually caused by ground movement, age, or, occasionally, poor original construction. A plumbing leak is in the pipework running to and from the pool, often underground, and can be on the suction side (where the pump is drawing air, which shows up as bubbles or a struggling pump) or the return side (where pressurised water is escaping, which shows up as water loss with no visible cause). An equipment leak is at the pump, filter, valves, or their fittings — usually visible as damp patches or dripping around the pump room rather than a change in pool water level. Each type needs a different diagnostic approach, which is why we don’t jump straight to a fix before confirming which of the three we’re actually dealing with.

Why Guesswork Costs More Than Testing

The most expensive leak detection is no leak detection at all. We’ve been called in more than once after a pool was fully resurfaced to fix a leak that turned out to be a single loose skimmer fitting the whole time — the resurfacing looked good, but the pool kept losing water because nobody had confirmed where it was actually escaping from. A proper diagnostic visit costs a fraction of a full resurface, and it means whatever work follows is actually solving the problem instead of hoping it does.

What’s Included in a Leak Detection Visit

• Full visual inspection of the pool shell, fittings and visible equipment.
• Bucket test setup and guidance if the leak rate needs to be confirmed over 24–48 hours.
• Dye testing at suspected fitting points.
• Pressure testing of suction and return lines to isolate plumbing leaks.
• A written explanation of what we found and what it means, before any repair work is quoted.

Common Questions

How long does leak detection take?

A straightforward case — visual inspection plus dye or pressure testing — can often be completed in a single visit. If a bucket test is needed to confirm the leak rate first, that adds 24 to 48 hours before we come back to trace it.

Can you detect a leak without draining the pool?

In most cases, yes. Dye testing and pressure testing are both done with the pool full. Draining is sometimes needed for repairs afterward, but rarely for the detection itself.

What if you can’t find the leak?

It’s uncommon once we’ve gone through the full process, but if a leak is genuinely elusive, we’ll tell you honestly rather than guess — and discuss next steps, which might include electronic listening equipment or a more targeted excavation in a specific, narrowed-down area.

Will you break open my paving to find a leak?

Only as an absolute last resort, and never without discussing it with you first. Pressure testing and listening equipment are specifically there to narrow the location down so any digging is as small and targeted as possible.

Book a Leak Detection Visit

If your pool is losing water and you can’t explain why, call or WhatsApp +27 78 348 9627. We’ll ask a few quick questions to get a sense of what we’re dealing with before booking a site visit.