Repairing Swimming Pool Pipe Leak Under Concrete Slab

A pool pipe leak under concrete is one of the most frustrating challenges for any pool owner. Water loss, increased bills, and potential damage to your pool deck or home’s foundation make this a problem you can’t ignore. The good news: with the right approach and technology, you can repair a pool pipe leak under concrete efficiently and restore your swimming pool to perfect condition. At South Texas Pool Leak Detection, we specialize in finding and fixing even the toughest leaks using Leaktronics’ industry-leading leak detection equipment. Here’s everything you need to know about repairing leaking pool pipes beneath concrete in San Antonio.

How Do You Know If You Have a Pool Pipe Leak Under Concrete?

The first sign of a pool pipe leak under concrete is usually a sudden drop in your swimming pool’s water level. You might also notice wet spots, puddles, or cracks forming on your pool deck. Sometimes, you’ll hear the sound of running water beneath the slab or see increased water bills without an obvious reason. If your pool is losing more water than normal evaporation accounts for, or if you see these signs, it’s time to suspect a leak.

Professional leak detection is essential for pinpointing the exact location of the leak. Our team uses advanced electronic listening devices and pressure testing to identify leaks in pipes buried under concrete, saving you from unnecessary digging and guesswork.

What Causes Pool Pipe Leaks Under Concrete?

Pool pipe leaks under concrete can result from several factors. Over time, shifting soil, tree roots, or ground movement can stress and break PVC pipes or fittings. Construction accidents, such as drilling or digging near the pool, may also damage pipes. In older pools, corrosion or wear and tear can weaken the plumbing system, causing leaks in pipes that are buried underground or beneath the pool deck.

No matter the cause, early leak detection and repair are crucial to prevent further damage to your pool and property.

How Are Pool Pipe Leaks Detected?

Detecting a leak under concrete requires specialized equipment and expertise. At South Texas Pool Leak Detection, we use Leaktronics’ electronic listening devices to “hear” water escaping from pipes, even under thick slabs. Pressure testing is another key tool—by isolating sections of the pool plumbing and applying air or water pressure, we can identify which line is leaking.

Once the leak is located, we mark the area for targeted repair, minimizing the need for unnecessary demolition and helping you save on repair costs.

Can a Pool Pipe Leak Under Concrete Be Fixed Without Digging?

Thanks to modern technology, some pool pipe leaks under concrete can be repaired without major digging. Pipe lining and epoxy injection systems, like Pipepoxy, allow technicians to seal leaks from inside the pipe itself. This trenchless repair method coats the interior of the pipe with a strong, watertight epoxy, sealing cracks and holes without breaking up the concrete above.

Not all leaks are suitable for trenchless repair, but when possible, this approach is less invasive, faster, and more cost-effective than traditional methods.

What If the Leak Requires Breaking Concrete?

If trenchless repair isn’t an option—such as with severely damaged or collapsed pipes—targeted excavation is necessary. Our team carefully cuts and removes only the section of concrete needed to access the leaking pipe. Once exposed, we repair or replace the damaged section using PVC pipe and watertight fittings. After the repair, we restore the concrete slab or pool deck, ensuring a seamless finish.

Professional repair methods minimize disruption and prevent further damage to your pool and property.

What Are the Steps to Repair a Pool Pipe Leak Under Concrete?

The typical process to repair a pool pipe leak under concrete involves:

Locating the leak with electronic leak detection and pressure testing.
Marking the exact spot to minimize the area of excavation.
Carefully cutting through the concrete slab or pool deck.
Exposing the leaking pipe and assessing the damage.
Repairing the leak with a patch, clamp, or pipe replacement.
Restoring the concrete and finishing the pool deck.

After the repair, we test the plumbing system under pressure to ensure the leak is fully sealed.

How Can You Prevent Future Pool Pipe Leaks?

Preventative maintenance is key to avoiding future leaks. Regularly monitor your pool’s water level and inspect for wet spots or cracks around the pool. Maintain balanced water chemistry to prevent pipe corrosion. Schedule annual leak detection with a professional service to catch small issues before they become big problems.

Using high-quality PVC pipes and fittings during pool construction or renovation also helps prevent leaks in the long run.

Why Is Professional Leak Detection and Repair Important?

Pool pipe leaks under concrete are complex and require specialized tools and experience. Attempting a DIY repair can lead to more damage, higher costs, and even structural issues. Professional leak detection ensures the exact location of the leak is found, and expert repair techniques restore your pool’s plumbing system efficiently.

At South Texas Pool Leak Detection, we use industry-leading Leaktronics equipment to deliver accurate, non-invasive leak detection and reliable repairs for pool owners in San Antonio.

What Should You Do If You Suspect a Leak?

If you notice unexplained water loss, wet spots, or cracks around your pool, don’t delay. Contact a professional leak detection company to assess the situation. Early intervention can prevent costly repairs, protect your pool and property, and keep your swimming pool running trouble-free.

Our team at South Texas Pool Leak Detection is ready to help you find and fix any leak—no matter how hidden or challenging.

Can Concrete Pool Leaks Be Prevented?

While some leaks are unavoidable due to age or ground movement, regular pool maintenance, prompt repairs, and professional inspections can greatly reduce your risk. Keep an eye on your pool’s water level, check for signs of leaks, and address plumbing issues as soon as they arise.

Investing in preventative care is the best way to ensure your pool remains a source of enjoyment, not frustration.

Key Points to Remember

Pool pipe leaks under concrete can cause water loss, increased bills, and property damage if left untreated.
Signs of a leak include sudden drops in water level, wet spots, cracks, or sounds of running water under the slab.
Leak detection with electronic listening devices and pressure testing is essential for accurate, non-invasive diagnosis.
Trenchless repair methods like epoxy lining can sometimes fix leaks without digging, but severe damage may require targeted excavation.
Professional repair restores your pool’s plumbing system and concrete, ensuring a seamless finish.
Regular maintenance and inspections help prevent future leaks and protect your investment.
South Texas Pool Leak Detection uses Leaktronics’ advanced technology for fast, reliable leak detection and repair in San Antonio, TX.
Don’t ignore signs of a leak—early action saves time, money, and your pool’s integrity.

Contact our team for expert pool repair near you!