Step-by-Step Tutorial: How to Redo Your Drain Field and Improve Drainage

A drain field is an essential component of any septic system, responsible for safely dispersing wastewater into the surrounding soil. Over time, drain fields can become clogged or damaged, leading to backups, overflows, and potential health hazards. Redoing a drain field can be a complex task, but with proper planning and execution, it can ensure the longevity and efficiency of your septic system. This comprehensive guide will walk you through every step of the process, empowering you to tackle this project with confidence.

1. Assess the Situation: Determine the Cause of the Problem

Before embarking on the redo process, it’s crucial to identify the root cause of the drain field failure. Common culprits include:

• Clogged pipes or filters
• Tree root intrusion
• Compacted soil
• Excessive water usage

2. Design the New Drain Field: Size and Layout

The size and layout of the new drain field will depend on the size of your home, the number of occupants, and the soil conditions. It’s recommended to consult with a licensed septic professional to ensure proper design and compliance with local regulations.

3. Excavate the New Drain Field Area

Once the design is finalized, it’s time to excavate the area where the new drain field will be installed. The excavation should be deep enough to accommodate the gravel bed and perforated pipes.

4. Install the Gravel Bed

A gravel bed is essential for providing support and drainage for the perforated pipes. The gravel should be clean, crushed stone with a size of 1-2 inches.

5. Lay the Perforated Pipes

The perforated pipes are the primary means of distributing wastewater into the soil. They should be placed in parallel rows, with the perforations facing downward.

6. Cover the Pipes and Backfill

Once the pipes are in place, they should be covered with a layer of filter fabric to prevent soil from clogging the perforations. The excavation can then be backfilled with soil.

7. Restore the Landscape

After the backfilling is complete, it’s time to restore the landscape and re-establish vegetation over the drain field area. Avoid planting trees or shrubs with extensive root systems that could damage the pipes.

8. Maintain the Drain Field: Tips for Longevity

Regular maintenance is essential for extending the life of your drain field. Key maintenance practices include:

• Conserving water usage
• Pumping the septic tank regularly
• Inspecting the drain field area for any signs of clogging or damage

9. Troubleshooting Common Drain Field Problems

While proper installation and maintenance can minimize problems, occasional issues may arise. Here’s how to address common drain field issues:

• Clogged pipes: Use a drain snake or hydro-jetting to clear the blockage.
• Root intrusion: Cut or remove tree roots that have invaded the drain field.
• Compacted soil: Aerate the soil to improve drainage.
• Excessive water usage: Reduce water consumption or consider installing a larger drain field.

10. Hiring a Professional: When to Call for Help

If you encounter complex drain field problems or lack the necessary skills, don’t hesitate to contact a licensed septic professional. They can diagnose the issue accurately and provide expert solutions.

11. Cost Considerations: Budgeting for a Drain Field Redo

The cost of redoing a drain field can vary depending on the size of the system, the complexity of the installation, and local labor rates. On average, it can range from $3,000 to $10,000.

What People Want to Know

Q1: How often should a drain field be redone?

A: The lifespan of a drain field typically ranges from 15 to 25 years. However, factors such as usage, maintenance, and soil conditions can affect its longevity.

Q2: What are the signs that a drain field needs to be redone?

A: Signs of a failing drain field include slow drainage, backups, overflows, and foul odors.

Q3: Can I redo a drain field myself?

A: While it’s possible to tackle a drain field redo as a DIY project, it’s highly recommended to hire a licensed septic professional for proper installation and compliance with local regulations.

Q4: How long does it take to redo a drain field?

A: The time frame for redoing a drain field can vary depending on the size of the system and the complexity of the installation. On average, it can take 2-5 days to complete.

Q5: What are the alternative options to redoing a drain field?

A: In some cases, alternative options to redoing a drain field may include:

• Aerobic treatment units (ATUs): These systems use oxygen to treat wastewater, reducing the need for a large drain field.
• Sand filters: These systems use sand to filter and disperse wastewater, which can be more suitable for areas with poor soil conditions.