Don’t let slab leaks go undetected! Call the pros at John’s Plumbing & Drain Services for Professional Slab Leak Detection and Repair in Los Angeles, CA, and surrounding areas. Call us today at (323) 422-7485 to schedule a service appointment.

Are you experiencing mysterious water puddles, dampness, or a sudden increase in your water bill? These signs may indicate a hidden plumbing issue known as a slab leak. Slab leaks occur when pipes beneath your home’s foundation develop leaks, leading to water seepage and potential structural damage. Detecting and addressing slab leaks promptly is crucial to prevent further damage and costly repairs. At John’s Plumbing & Drain Services we specialize in professional slab leak detection and repair services in Los Angeles and the surrounding areas. With our state-of-the-art equipment and experienced technicians, we can accurately locate and repair slab leaks, ensuring the integrity of your property. Don’t let slab leaks compromise your home’s foundation. Contact us today at (323) 422-7485 to schedule your slab leak detection and repair. Trust John’s Plumbing & Drain Services for reliable and efficient solutions that protect your property.

What is a Slab Leak?

Slab leaks refer to the occurrence of water leaks within the foundation or concrete slab of a building. These leaks can be particularly troublesome as they are hidden from sight and can cause significant damage if left untreated. Understanding slab leaks is crucial for homeowners to recognize the signs and take prompt action to mitigate potential risks.

Slab leaks can occur in residential or commercial properties and are typically associated with the plumbing system that runs beneath the concrete slab. The plumbing pipes embedded within the foundation can develop leaks for various reasons, leading to water seepage and damage to the surrounding structure.

Common Causes of Slab Leaks: Unveiling the Culprits

  •     Corrosion: Over time, galvanized steel or copper pipes can deteriorate due to corrosion. Corrosion occurs when the metal pipes react with minerals and chemicals in the water supply, gradually weakening the pipe walls and causing leaks.
  •     Shifting Soil: The soil beneath a building’s foundation can undergo movement or shifting, exerting pressure on the plumbing pipes. This pressure can lead to pipe stress, cracks, or misalignment, resulting in leaks.
  •     Poor Installation: Faulty or improper installation of plumbing pipes can contribute to future slab leaks. Inadequate connections, improper sealing, or insufficient support during installation can weaken the pipe joints, making them more prone to leaks.
  •     Abrasion and Friction: Constant contact between pipes and abrasive materials, such as rocks or debris, can gradually wear down the pipe surface. Additionally, excessive friction caused by improper pipe securing or movement can lead to leaks over time.
  •     Water Pressure: Excessive water pressure can strain plumbing pipes, leading to pipe damage and eventual leaks. High water pressure can result from factors such as faulty pressure regulators, water hammers, or pressure spikes in the municipal water supply.

Detecting and addressing slab leaks promptly is crucial to prevent further damage to the foundation and surrounding structures. If you suspect a slab leak in your property, it is recommended to seek professional assistance from a reputable plumbing company like John’s Plumbing & Drain Services. Our experienced technicians are equipped with advanced leak detection tools and expertise to locate and repair slab leaks accurately, minimizing the disruption to your property and ensuring the integrity of your plumbing system.

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Early Warning Signs of a Slab Leak

  •         Unexplained Water Puddles

The presence of water puddles in areas where there shouldn’t be any can clearly indicate a slab leak. If you notice water accumulating on your floors or near the foundation, it’s essential to investigate the source promptly.

  •         Damp or Warped Flooring

A slab leak can cause moisture to seep into your flooring materials, resulting in dampness, soft spots, or even warping. If you observe unusual changes in the condition of your floors, it may be a sign of a hidden plumbing issue beneath the slab.

  •         Sudden Decrease in Water Pressure

If your faucets or showerheads experience a significant decrease in water pressure without any apparent reason, it could be due to a slab leak. Leaking pipes within the foundation can disrupt the water flow, reducing water pressure in various fixtures throughout your home.

  •         Unusual Increase in Water Bills

Keep a close eye on your water bills. If you notice a sudden and unexplained spike in your monthly water expenses, it could indicate a hidden leak in your plumbing system. A slab leak, in particular, can cause significant water wastage, leading to higher consumption and inflated bills.

  •         Mold or Mildew Growth

 Excessive moisture from a slab leak can create a favorable environment for mold and mildew growth. If you observe mold patches or notice a musty odor in areas near the foundation, it’s essential to address the issue promptly to prevent further mold infestation and potential health risks.

  •         Cracking or Shifting foundation

In severe cases, a slab leak can cause the foundation to crack or shift due to the constant water pressure and saturation. Look for any visible signs of foundation damage, such as cracks in the walls, uneven floors, or doors and windows that no longer align properly.

If you suspect a slab leak based on these warning signs, it is crucial to contact a professional plumbing company like John’s Plumbing & Drain Services for accurate detection and swift repair. Don’t ignore the signs; early intervention prevents further complications and costly repairs.

Frequently Asked QUESTIONS About SLAB LEAKs

Can a slab leak cause foundation damage?

If left untreated, a slab leak can lead to foundation damage. The constant flow of water beneath the foundation can erode the soil, causing the foundation to shift or crack. It’s crucial to address slab leaks promptly to prevent further structural issues.

How are slab leaks repaired?

The repair method for a slab leak depends on the specific location and severity of the leak. In some cases, the plumber may opt for epoxy pipe lining, which involves coating the interior of the affected pipe to seal the leak. If the damage is extensive, the plumber may need to perform a rerouting of the plumbing system.

How long does it take to repair a slab leak?

The duration of a slab leak repair depends on various factors, including the complexity of the issue and the accessibility of the plumbing system. A simple slab leak repair can take a few hours, while more extensive repairs may require a couple of days. The plumber will provide an estimate based on the specific circumstances.


Protect your home from the damaging effects of slab leaks. Choose John’s Plumbing & Drain Services for professional slab leak detection and repair services in Los Angeles and surrounding areas. Our skilled plumbers use advanced techniques to locate and resolve slab leaks quickly. Don’t wait for further damage to your foundation or potential mold growth. Call (323) 422-7485 now to schedule an appointment.

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Our water heater began spewing water this morning.  John was the first plumber in the area to answer my call, and was able to get to my house within 10 minutes of the call.  He fixed the problem promptly and for what seemed to be a reasonable price.  He was friendly and informative.  I will definitely call John again and will recommend him to neighbors.  Thanks, John!
-Caitlin R


John has done numerous plumbing projects around my house and has always done excellent work.  He's quick to respond to my inquiry's and even replaced my water heater on a Sunday.  Most recently, I had him install a water purification system and new faucet.  His prices are reasonable and he will continue to be my go-to plumber.
-Rachel R.

Very helpful guy, thank you for the quick service and low service fee 🙂 Job well done.
-Sandra F.


These guys are the best! If you're looking for a legit plumber, call John's Plumbing & Drain Services in Atwater Village. Fairest price, honest and very knowledgeable!
-Ashley C.

Project: Install a Tankless Water Heater System

Comments: john and company were very efficient. they took their time and got the job done right. they replaced my standard water heater with a rinnai tankless water heater. while they were here, I also had them install a earthquake shut-off valve. great job at a reasonable price. I am keeping john as our regular plumber for the future.
Sergio S. in La Crescenta, CA

Project: Install, Repair or Replace Plumbing or Fixtures

Comments: My tenant is happy so I am happy. John was very patient with me and explained everything before he did the job. Very nice over the phone and I will use him again for future plumbing needs.

 Marilyn L. in Pasadena, CA

Project: Install, Repair or Replace Plumbing or Fixtures

Comments: I am very pleased. I've had John do the top priority job of repairing a leaking drainpipe and his work looks to be top notch. I'm definitely thinking of using him for the larger job of repiping the whole house (replacing the failing M-type copper with L-type). And again, John's bid is within my budget considerations. Highly recommended.

Homeowner in Glendale, CA

Project: Install or Replace a Water Heater

Comments: John was great. He gave me options and worked with me to find a solution that worked within my budget. Very professional. I will definitely use him again for any plumbing issues.

Laura W. in South Pasadena, CA

Project: Install or Replace a Water Heater

Comments: John was very responsive to my initial call, showed upon time and did excellent work at a fair price to replace my water heater. I highly recommend him and I plan to use him for future plumbing needs

Gary P. in Sherman Oaks, CA

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Comments: We had them run a snake from our sewer line out to the street, as we have lots of trees with roots that sometimes get into the line. They came as scheduled, did a great job and the price was as quoted.

Colleen L. in Pasadena, CA


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John's Plumbing & Drain Services

3847 Brunswick Avenue, LA, Ca, 90039

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