POOL LEAK DETECTION SPECIALISTS

We’re here to help

Is your swimming pool constantly losing water? Do you have unexplained high-water bills? Do you suspect a leak but can’t find it?

A small leak can result in a massive loss of water. A 3mm leak can waste up to 12,000 litres of water per day! Dependant on the size and location of leaks, a water level drop of 2.5cm in a 6 x 3-meter pool can equate to a daily loss of approximately 450 litres.

Over a month, this would result in a total water loss of roughly 13,500 litres. Larger leaks could lead to even more significant losses, potentially exceeding thousands of litres per day and tens of thousands per month. Leaks in pool plumbing systems are especially concerning as they not only waste water, but may also cause structural damage if unresolved.

Core Leak Detection is Cape Town’s leading specialist in pool leak detection and repair. Through our advanced equipment and expert technicians, we can quickly locate and repair pool leaks in all types of swimming pools, saving you time, water, and money.

Our comprehensive services

Precise leak detection: State-of-the-art equipment for accurate results.
Expert technicians: Highly skilled staff with extensive experience.
Full-service solution: From detection to repair, we handle it all.
All pool types: Residential, commercial, and speciality pools.
Rapid response: Quick service for jobs of all sizes.

At Core Leak Detection, we understand that your pool is a cherished part of your home. The last thing you want is someone lifting your paving and digging all around your pool to find a leak.

Our non-intrusive pool leak detection process respects your property while delivering accurate results.

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OUR POOL LEAK DETECTION METHODS

Identifying pool leaks early is key to protecting your investment and avoiding costly repairs. Below are the advanced techniques we use to accurately detect leaks in your pool system.

Water and air pressure testing

We use water and air pressure testing to assess the condition of your pool’s plumbing system. By sealing off the pool fixtures and pressurizing the pipes, we monitor if the system can maintain the set pressure. A drop in pressure signals a potential leak. This method is especially effective in confirming if leaks are present in underground pipes where leaks are otherwise invisible.

Tracer gas

With tracer gas detection, we introduce a safe, inert gas into your pool’s plumbing. Specialized sensors detect where the gas escapes, enabling us to pinpoint even hard-to-find leaks in underground or concealed pipes.

Acoustic and hydrophone leak detection

Our acoustic leak detection method uses sensitive listening devices to pick up the sound of water or air escaping from pipes. For leaks within the pool structure, we use hydrophones, which are specialized for underwater sound detection. These methods allow us to locate leaks in hard-to-reach areas with pinpoint accuracy.

Dye testing

For a simple yet effective leak detection method, we offer dye testing. A small amount of dye is introduced near suspected leak areas. If there’s a leak, the dye will be drawn toward it, allowing us to visually confirm its location.

Infrared thermal imaging

Our thermal imaging technology uses infrared cameras to detect temperature variations on surfaces that could indicate moisture due to a leak. This method is perfect for detecting leaks behind pool walls, beneath pool decks, or in areas with restricted access.

Moisture testing

Surface and substrate moisture testing uses moisture meters to measure moisture levels in and around your pool structure. Elevated moisture levels often indicate a hidden leak and assists in pinpointing leaks along with the other specialised equipment that we use.

Camera inspection

Our camera inspection method involves inserting a small camera into your pool’s plumbing system. This provides a visual assessment of the pipes to spot cracks, loose fittings, or other potential issues that could be causing leaks.

LEAK DETECTION REPORTS

We provide detailed reports that include our findings, recommendations, images, and more.

View samples of our reports below.

Pool Leak Detection

Sample Report #1

Pool Leak Detection

Sample Report #2

Pool Leak Detection

Sample Report #3

SIGNS THAT YOU HAVE A LEAK

Recognising the signs of a pool leak early can save you time, money, and stress. Here are the key indicators to watch for:

Rapid water level drop

If your uncovered pool loses more than 6mm of water daily it is likely to be leaking.
Perform a “bucket test” to differentiate between evaporation and leakage. Click here for how to perform this test.

Unexplained high-water bills

A sudden spike in your water bill could indicate a hidden leak.
Automatic pool fillers may mask water loss but increase your bills.

Wet or soggy areas around the pool

Look for unusually damp spots in the lawn near your pool.
Pay attention to uneven or lush growth in grass or landscaping.

Cracks or gaps in pool structure

Inspect the pool shell, tiles, and coping for visible cracks or separations.
Even small cracks can lead to significant water loss over time.

Excessive algae growth

Persistent algae problems may indicate a constant influx of untreated water.
This can also lead to difficulty maintaining proper chemical levels.

Air in the pool system

Bubbles coming from return lines when the pump is running suggest a suction-side leak.
You may also hear gurgling sounds from the skimmer or pump.

Pool equipment leaks

Check for water accumulation or dampness around pumps, filters, heat pump, and solar heater system.
Look for calcium deposits on equipment, which can indicate slow leaks.

Shifting or sinking pool deck

Deck tilting or sinking is a sign of water eroding soil beneath.
Watch out for sunken pavers or cracked tiles around the pool area.

Our comprehensive approach to pool leak detection

We combine these cutting-edge methods to provide a comprehensive pool leak detection strategy. By utilizing multiple techniques, we ensure that leaks don’t go undetected, safeguarding your pool and preventing water loss or structural damage.

Ready to protect your pool? Contact us today for a comprehensive leak inspection!

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POOL REPAIRS

At Core Leak Detection, we don’t just find leaks—we also fix them. In certain instances, and where the technicalities of such leak repairs demand it, we bring our trusted professional partners on board, to ensure your repairs are correctly completed. Our comprehensive pool repair services ensure that your pool is restored to perfect working condition quickly and efficiently.

Pipe repairs

We offer both traditional pipe replacement and can facilitate innovative pipe relining solutions where possible.

Fitting and equipment repairs

We repair or replace faulty skimmers, returns, lights, and other pool fittings. Our technicians are skilled in repairing a wide range of pool equipment.

Waterproofing

We can apply advanced waterproofing solutions to prevent future leaks. Our repair services are designed to be effective, and long-lasting. We use only the highest quality materials and the latest repair techniques to ensure your pool remains leak-free for years to come.

HOW IT WORKS

Initial contact

Get in touch with us through phone, WhatsApp, email, or by filling out our Get a Quote form.

Consultation and scheduling

A team member will discuss your needs, pricing, and arrange a convenient date and time for the inspection.

Comprehensive inspection

Our expert leak detection team will conduct a thorough inspection using non-invasive technology to find the leak.

Detailed report and recommendations

You’ll receive a full report outlining all the tests performed, findings, recommended repairs and a quote for the repairs.

Approval and repair scheduling

Once you approve the repair quote, we’ll schedule a repair date and take care of the issue efficiently.

Still Have Questions?

Speak to one of our experts and get personalized advice before booking your inspection.

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WHY OPT FOR PROFESSIONAL POOL LEAK DETECTION

Opting for professional pool leak detection with CORE Leak Detection offers a range of advantages that can save you time, money, and headaches:

Cost savings and efficiency

Early detection: Professionals can identify leaks before they cause costly damage to your pool structure or surrounding areas.
Lower utility bills: Quick, accurate detection helps stop water waste, reducing both water and energy bills.

Advanced, non-invasive technology

Accurate leak location: Using advanced equipment like acoustic listening devices, tracer gas detection, pressure and dye testing, professionals pinpoint leaks with precision, avoiding unnecessary excavation.
Fast results: Professional methods find leaks in hours, compared to the guesswork and delays with DIY approaches.

Minimized property damage

Non-destructive methods: Leak detection is performed with minimal disruption, protecting your pool, decking, and landscaping.
Targeted repairs: With precise detection, only the affected areas are repaired, reducing the scope and cost of fixes.

Avoid DIY risks

Inaccuracy: DIY methods, like the bucket test, may confirm a leak but often fail to find its exact source.
Potential for more damage: Incorrect repairs can make leaks worse, leading to higher costs down the line.

Expertise and peace of mind

Professional insight: Our expert technicians have years of experience and have done leak detections on hundreds of pools, and detect subtle signs and use advanced tools, to locate hidden leaks.
Comprehensive solutions: Professionals offer full services from detection to repair, safeguarding your investment for the long term.

Stop guessing and start saving. Book your pool leak inspection with Core Leak Detection today and enjoy peace of mind.

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WHY CHOOSE US

At Core Leak Detection we stand out in the pool leak detection industry for our commitment to accuracy, efficiency, and customer satisfaction. Here’s why you should trust us with your pool:

Professional pool leak detection

Our experience in the industry is profound. We perform multiple leak detections annually and boast the widest range of leak detection testing equipment in Cape Town. We utilize multiple detection techniques such as acoustic listening devices, tracer gas, pressure testing, and thermal imaging. Our cutting-edge technology ensures accurate leak detection with minimal disruption to your property.

Guaranteed, fast results

Our non-invasive leak detection methods mean no unnecessary property damage. We guarantee fast and efficient results, ensuring your pool is back in top shape as soon as possible.

Expert technicians

Our team consists of trained professionals with years of experience. We understand how to address even the most complex pool leak issues, saving you time and money.

Comprehensive leak reports

After each inspection, we provide a detailed, transparent report outlining all findings, including recommendations for repairs and a competitive quote. You’ll know exactly what needs to be done. (For samples of these reports, click here.)

Customer-first approach

Your satisfaction is our top priority. From quick response times to ensuring minimal disruption, we make your pool repair experience smooth and stress-free. Our customer reviews speak for themselves.

Don’t let leaks cause costly damage. Contact us today for professional leak detection and quick, reliable repairs!

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DIY TESTING METHODS

Want to check if you have a leak? Here are a few DIY methods that you can use to test whether you may have a leak or not:

The bucket test

What it does

The bucket test helps determine if water loss is due to evaporation or a leak.

How to perform

Place the bucket on a pool step, fill the bucket with pool water to the same level as the pool marking the water levels inside the bucket and on the outside of the bucket (representing the pool’s water level). Ensure the bucket is weighed down to keep it in place. A few stones or bricks would keep the bucket in place.
After 48 hours, compare the water levels inside and outside the bucket. If the pool water has dropped more than the bucket water, there may be a leak.
This can be done twice, first with the pool filtration system turned of for two days thereafter with the pool filtration running its normal cycle for two days or a minimum of six hours over the two days. Doing them independently can give indication on whether the leak is in the pool lining or in the pool plumbing.
If water loss increases when the pump is running, the leak may be on the pressure side (after the pump). If the loss is consistent, it could be a leak on the suction line or the pool lining.

Why it works

The bucket test separates evaporation from water loss due to leaks.

Dye test

What it does

Helps detect leaks around pool fittings, lights, or suspected cracks.

How to perform

Turn off the pool pump to ensure still water.
Use a leak detection dye or diluted food colouring and a syringe near suspected areas (skimmers, jets, light niches, cracks).
Watch for the dye being drawn into the leak location.

Why it works

Water flows to the source of the leak, pulling the dye with it.

Monitor water loss

What it does

Helps to determine if water loss is excessive compared to normal evaporation.

How to perform

Measure and record the pool’s water level at the same time over a few days.
Compare the daily water loss to average evaporation rates (typically around 4 to 6mm per day).
If the loss is significantly higher, it likely indicates a leak.
This can be done with the filtration system turned of for a few days and then with the filtration system on its normal cycle. Measuring them independently can give indication on whether the leak is in the pool lining or in the pool plumbing.
If water loss increases when the pump is running, the leak may be on the pressure side (after the pump). If the loss is consistent, it could be a leak on the suction line or the pool lining.
Look for air bubbles in the pump basket or return jets, which can indicate suction-side leaks.

Why it works

Measuring over several days gives a clearer picture of abnormal water loss that might be affected by weather conditions.

Visual inspection

What it does

Identifies visible signs of leaks around the pool.

How to perform

Inspect for cracks, loose tiles, or gaps in the pool’s surface, especially around the skimmer, returns, lights, and fittings.
Check the equipment pad for moisture, drips, or puddles.
Look for wet spots or uneven grass near the pool’s plumbing or structure.

Why it works

Often leaks, especially above ground, can be identified visually.

COMMON POOL LEAKS AND CAUSES

Skimmer to pool bond

Description: Leaks often occur where the skimmer meets the pool wall, especially in concrete pools.
How to identify: Perform a dye test near the skimmer and check for water being drawn into cracks.
Causes: Separation due to shifting soil, movement between the skimmer and the pool shell, or poor installation.

Underground plumbing

Description: Underground pipes can break due to soil movement or corrosion.
How to identify: Look for wet patches or soil erosion around the pool.
Causes: Ground movement, corrosion of pipes, or poor installation.

Pool light niche

Description: Leaks often occur around the conduit or the outer ring of the pool light.
How to identify: If water stabilizes at the level of the pool light, it likely indicates a leak at the light niche.
Causes: Cracks in the conduit, faulty seals, or ground shifts.

Return jets

Description: Leaks occur at the connections where return jets meet the pool walls.
How to identify: Perform a dye test around the jets.
Causes: Loose fittings or cracks in the return lines.

Tile and coping

Description: Cracks in tiles or scum line lead to water loss, particularly in older pools.
How to identify: Visually inspect for cracks or gaps or use a dye test to check for water movement.
Causes: Ageing, weathering, or soil shifts affecting the pool structure.

Pool shell cracks

Description: Cracks in the concrete or fiberglass pool shell can lead to leaks.
How to identify: Visually inspect the pool walls for cracks or use a dye test.
Causes: Ground movement, ageing, causing stress on the pool shell.

Skimmer cracks

Description: Skimmers develop cracks over time due to exposure to the elements.
How to identify: Use a dye test around the skimmer to check for suction of water into the cracks.
Causes: Soil movement, age, or improper installation of the skimmer.

Multiport valve

Description: Leaks occur at the multiport valve of the sand filter.
How to identify: Check if water trickles from the waste line when the pump is in filter mode.
Causes: Worn valve seals or improper closure after backwashing.

PVC pipe outlets

Description: Leaks occur at the connections between PVC pipes and pool plumbing.
How to identify: Look for wet areas around pipe outlets or cracks in the fittings.
Causes: Cracked or disconnected pipes due to shifting soil or stress.

Equipment pad

Description: Leaks at the equipment pad usually involve pumps, filters, or valves.
How to identify: Check for wet spots, puddles, or drips around the equipment.
Causes: Loose fittings, worn seals, or corrosion at the equipment pad.

Heater connections

Description: Leaks at the connections between the heater and pool plumbing.
How to identify: Look for water puddles or moisture around the heater connections.
Causes: Loose fittings, worn seals, or corrosion in the heater plumbing.

Plaster finishes around outlets

Description: Marbelite or similar finish may not be bonded well around PVC outlets, leading to leaks.
How to identify: Use a dye test around the outlet fittings to check for leaks.
Causes: Poor bonding of new plaster to the pool’s outlets.

Pressure-side plumbing

Description: Leaks on the pressure side of plumbing (after the pump) can cause significant water loss.
How to identify: Look for water loss when the pump is running or listen for running water sounds.
Causes: Cracked pipes, loose fittings, or damage to the plumbing.

Suction-side plumbing

Description: Suction-side leaks (before the pump) allow air into the system, reducing efficiency.
How to identify: Check for air bubbles in the pump basket or return lines.
Causes: Loose fittings or crack in fittings and pipes on the suction-side.

Pool steps

Description: Cracks or separations around pool steps are common sources of leaks.
How to identify: Inspect for cracks or gaps at the base of the steps.
Causes: Age, ground movement, or poor installation.

Filter tank seals

Description: Leaks at the seals of sand filters are a frequent issue.
How to Identify: Check for moisture or visible cracks around the sand filter.
Causes: Worn or damaged tank seals due to incorrect installation or age.

FREQUENTLY ASKED QUESTIONS

General pool leak detection

How do I know if my pool is leaking?

Signs of a pool leak include water loss, wet areas around the pool, air bubbles in the pump, or an increase in water bills.

Can I find a pool leak on my own?

Basic tests like the bucket test can help to confirm the presence of a leak, but accurate detection usually requires professional equipment and expertise.

What is the bucket test and how does it work?

Fill a bucket and place it on a pool step. If the pool’s water level drops faster than the water inside the bucket after 48 hours, you may have a leak. For an easy-to-follow YouTube video on how to perform this test, click here.

What is the dye test and how does it work?

Turn off the pool pump to ensure still water. Use a leak detection dye or diluted food colouring and a syringe near suspected areas (skimmers, jets, light niches, cracks). Watch for the dye being drawn into the leak location.

How much water loss is normal for a pool?

Typically, uncovered pools lose 3 to 6mm of water per day during summer due to evaporation. Any more than this might indicate a leak.

Do water features like fountains increase the chance of water loss?

Yes, water features can contribute to additional water loss

Why should I hire Core Leak Detection for professional services?

Our experience in the industry is profound. We perform multiple leak detections annually and boast the widest range of pool leak detection testing equipment in Cape Town. We use advanced equipment like hydrophones, tracer gas, thermal imaging and pressure testing, providing accurate, non-invasive leak detection to minimize property damage.

How long does pool leak detection take?

Typically, it takes about 90min for a standard size pool with a single filtration system. Larger pools with multiple filtration systems, water features, rim flows or troughs can take a few hours extra.

Do I need to be home for the inspection?

No, but it is ideal to have someone present familiar with the history of the pool. If we have access to the pool and equipment area, the inspection can be done without you being present.

What equipment do you use to detect pool leaks?

We use a combination of acoustic listening devices, tracer gas, endoscopes, thermal imaging cameras, dye testing, pressure tests.

Repair and service questions

What happens if the leak is underground?

Depending on the position and complicity of the repair the area can be opened to do the repair and, in some instances, it makes more sense to do pipe relining.

Do I need to drain my pool to repair a leak?

It depends on where the leak was located. Leaks on the pools plumbing line can be done without draining the water. Leaks on the pool lining and fixtures connected to the lining would require that the pool gets drained partially.

What if my pool light is leaking?

There are several reasons that a pool light would leak and depending on what the cause and the size of the leak is it might require that the pool gets drained to a suitable level to perform the required work.

How long do pool leak repairs take?

Minor repairs can be completed in a few hours, while more complex issues might take a day or two depending on the severity.

Can Core Leak Detection fix leaks during the same visit?

In some cases, yes. If it’s a minor leak above ground, we can attempt to fix it on the spot if our schedule allows for it. More significant repairs may need a follow-up visit by one of our dedicated repair teams.

Pricing and process questions

How much does pool leak detection cost?

Our pricing is competitive, and starts from R2,150 for leak detection services across the majority of Cape Town, on standard pools. Specific costs depend on the pool size and complexity.

Is the repair cost included in the detection service?

No, leak detection and repairs are quoted separately and submitted along with the report.

Do you offer guarantees on your repairs?

Yes, we offer a 2-year guarantee on most repairs to give you peace of mind and ensure long-term solutions.

How do I schedule a leak detection?

You can schedule an inspection via phone, WhatsApp, email, or through our website’s online form. We’ll arrange a convenient time.

Can you fix leaks on the same day as the inspection?

If the leak is small and above ground, yes. For more complex issues, we may need to schedule a follow-up appointment for repairs.

How does Core Leak Detection ensure minimal disruption?

We use non-invasive tools and techniques to locate leaks without causing unnecessary damage to your property.

Pool maintenance and preventative care

What are the risks of ignoring a pool leak?

Ignoring leaks can lead to significant structural damage, increased water bills, and potential damage to your surrounding landscape.

Can a small pool leak turn into a bigger problem?

Yes, even a small leak can grow over time, potentially leading to more extensive and costly damage if left unrepaired.

Can a pool leak affect water chemistry?

Yes, a leak can disrupt your pool’s chemical balance, leading to algae growth and increased chemical usage.

How can I prevent future pool leaks?

While pool leaks can’t be entirely prevented, you can minimise risks by monitoring nearby tree and plant growth, using high-quality materials for repairs, and being mindful of pool plumbing during construction or landscaping projects to avoid unnecessary soil movement.

Does Core Leak Detection offer pool inspection services?

Yes, we offer full pool inspection services and testing to confirm whether there are any leaks in a pool when buying a house or installing a new pool.

Core Leak detection-specific questions

How do I book a service with Core Leak Detection?

Booking is simple! Contact us via phone, WhatsApp, email, or by filling out our online booking form. We’ll quickly respond to arrange a date and time for your pool inspection.

OUR CORE COMMITMENT

Great service

Our level of service is unsurpassed in the industry. We thrive on customer referrals and work hard to ensure we are deserving of yours.

Highest standards

We maintain the highest standards, not only in the quality of our work, but in all areas of business including certification, equipment and staff.

Professional team

When it comes to our team, you can rest assured that only highly skilled staff with a professional attitude will be brought to your premises.

Guaranteed outcome

You need the source of your leak found quickly and with the least amount of damage possible. That is the reason you are hiring us and this is what we do.

Related Services

Core Leak Detection is part of the Core Services Group which includes Core Electrical and Core Gas. We are a one-stop solution for all your core services, including all certified gas and electrical installations and maintenance.

We offer our complete range of services to commercial, industrial and residential clients.