How to Repair a PVC Sewer Pipe in the Ground

A broken underground PVC sewer pipe can take away anyone’s sleep. You could face sewage backups, suffer from serious health risks and significant property damage as well. Now, the first thing that comes to mind when dealing with a broken underground PVC pipe is tearing up your entire yard to fix the problem. Hold that thought because this guide will teach you how to repair a PVC sewer pipe in the ground without extensive excavation.

This method is a lifesaver when obstacles like sidewalks or foundations prevent you from digging up a large section of pipe. So, let’s begin.

Why Ignoring a Broken Underground PVC Sewer Pipe is a Big Mistake?

While a broken sewer pipe might seem like a distant plumbing problem, it’s crucial to address it promptly to avoid a cascade of issues. Here’s why ignoring a broken underground PVC sewer pipe can be a big mistake:

Health Hazards: 

Sewage is teeming with harmful bacteria and viruses that can cause serious health problems if humans or pets come into contact with it. A broken pipe can contaminate your property with raw sewage, leading to illnesses like gastroenteritis, E. coli infections, and even hepatitis A.

Property Damage: 

Leaking sewage isn’t just gross, it’s destructive. The moisture from the leak can seep into your foundation, causing cracks and instability. Additionally, sewage can damage flooring, walls, and even furnishings, leading to costly repairs and replacements.

Foul Odors: 

A broken sewer pipe will undoubtedly emit foul odors that can permeate your entire property. These odors are not only unpleasant but can also be embarrassing for you and your guests.

Environmental Impact: 

Untreated sewage can pollute nearby waterways and soil. If left unchecked, a broken sewer pipe can contribute to environmental damage and harm local ecosystems.

Decreased Property Value: 

A known sewer line issue can significantly decrease the value of your property. Potential buyers will be hesitant to take on the risk of expensive repairs.

By promptly addressing a broken underground PVC sewer pipe, you can avoid these potential problems and ensure the safety, hygiene, and value of your property.

Steps on How to Repair a PVC Sewer Pipe in the Ground: A Clever No-Dig Approach

Here’s a step-by-step guide on how to repair a PVC sewer pipe in the ground method that eliminates the need for extensive digging!

1. Locate the Leak Like a Pro: 

The first order of business is to pinpoint the exact location of the broken pipe. Signs of a leak can include soft spots in the ground, unusual settling, or sewage backups. You can also utilize a sewer line locator, a handy tool that emits radio waves to track the path of your buried pipes.

2. Prepare the Work Area: 

Once you’ve identified the leak’s location, carefully excavate a trench around the damaged section of the pipe. Aim to expose at least a foot of pipe on either side of the crack to provide enough space to work.

3. Cut Out the Damaged Section: 

Using a hacksaw, PVC pipe cutter, or a hot saw (depending on your preference), meticulously remove the damaged portion of the pipe. Make sure to extend the cut a few inches beyond the visible crack to ensure you eliminate the entire compromised area.

4. Clean and Prep the Pipe Ends: 

Debur the freshly cut ends of the pipe with sandpaper. This removes any rough edges and creates a smooth surface for optimal bonding with the PVC cement.

5. Introducing the Key Step: 

The Modified Coupling: Here’s the ingenious part that avoids extensive digging! You’ll need two couplings that match the diameter of your PVC pipe. However, for one of the couplings, you’ll need to make a slight modification. 

Using a Dremel with a grinding stone or a half-round file, remove the stop ring on this coupling. This modification allows the pipe to slide effortlessly into the fitting.

6. Apply PVC Cement: 

For this repair, a slow-setting PVC cement is recommended. Apply PVC cleaner to both the pipe ends and the coupling sockets. Then, slide the unmodified coupling onto one end of the pipe and hold it firmly for about 15 seconds to allow the cement to set.

7. Join the Pipe Section: 

After cleaning the modified coupling (without the stop ring) and the other pipe end with PVC cleaner, slide the modified coupling onto the pipe section and the existing pipe. Give it a gentle twist to ensure a secure connection.

8. Attach the Second Coupling: 

Mark the center point on the remaining pipe section. Apply PVC cleaner to the area around the mark and the socket of the unmodified coupling. 

Now, here’s the key to positioning this coupling:

Slide the coupling onto the pipe, ensuring it overlaps both the repaired section (where you replaced the damaged pipe) and the existing pipe on the other side. This creates a secure bond between all the connected parts.

9. Secure the Connection: 

This step involves creating a watertight seal using PVC cement:

• Apply a generous amount of PVC cement to both the pipe ends (the repaired section and the existing pipe) and the coupling socket.
• Slide the coupling into position, ensuring a tight fit all around. This might require some wiggling and maneuvering to get everything perfectly aligned.

10. Backfill the Trench: 

After the PVC cement has cured completely (refer to the manufacturer’s instructions for drying time), you can carefully refill the trench with the excavated dirt. Remember to pack the dirt back in firmly to avoid any settling or future issues.

When you follow these steps, you’ll successfully repair your broken PVC sewer pipe in the ground without resorting to extensive excavation. This method can save you time, effort, and potentially a significant amount of money compared to traditional repair techniques.

Important Note: While this guide powers you to tackle a PVC sewer pipe repair yourself, it’s crucial to prioritize safety. Sewage lines can harbor harmful bacteria. When working on sewer pipes, wear appropriate protective gear, including gloves, eye protection, and a respirator. 

If you’re unsure about any part of the process, it’s always best to consult a licensed plumber for professional assistance. You can hire JMK plumbing for all your plumbing needs. We’re just a call away. Dial 786-741-8571 to get started today.