If you’ve ever needed to access your septic system, you know that septic tank digging can be a challenging and labor-intensive task. Whether you’re repairing, inspecting, or replacing components, the process can quickly become overwhelming without the right equipment. That’s why we turned to our MX15RX mini excavator for the job, and the difference in speed, efficiency, and safety was remarkable. In this guide, we’ll share our experience, tips for success, and important safety considerations so you can be prepared if you ever need to tackle septic tank digging yourself.
Why Use a Mini Excavator for Septic Tank Digging
- Efficiency – A mini excavator can move dirt far quicker than manual labor, making the project significantly faster.
- Precision – The compact size allows you to dig with accuracy and minimal disruption to your yard.
- Accessibility – Perfect for navigating tight residential spaces that larger machines can’t access.
- Reduced Labor Costs – Less manual work means fewer labor hours.
- Operator Comfort – Designed for stability and ease of use, reducing strain on the operator.
Summary: When it comes to septic tank digging, a mini excavator isn’t just helpful, it’s often the most practical and cost-effective choice. It can save hours (or days) of manual work and reduce the mess in your yard.
Our MX15RX Mini Excavator in Action
We used our MX15RX mini excavator for this project, and it was the perfect match for the job.
Key Specs for the MX15RX:
- Operating Weight: 3,700 lbs (light enough for residential use, heavy enough for digging depth)
- Engine Power: 15 HP diesel for strong, reliable performance
- Digging Depth: Up to 8 feet, ideal for reaching septic tank lids and connections
- Bucket Width: 12 inches – narrow enough for targeted digging around septic systems
- Compact Width: 42 inches, great for maneuvering through gates and between landscaping
Summary: The MX15RX is small enough for backyard access yet powerful enough to handle septic tank digging without breaking a sweat.
Preparation Steps Before Septic Tank Digging
- Locate the Septic Tank – Use property records or septic system diagrams to find its exact position.
- Mark Utilities – Contact your local “Call Before You Dig” service to identify underground gas, water, and electrical lines.
- Consult a Professional – We had a plumber on-site during the dig to ensure accuracy and avoid damage.
- Assess Yard Access – Make sure your mini excavator can get close enough without damaging landscaping or driveways.
- Plan Your Dig Path – Avoid tree roots, irrigation lines, and fragile ground surfaces.
Summary: Proper preparation for septic tank digging reduces risks and prevents costly mistakes.
Digging Process with a Mini Excavator
- Position the Machine – Place the excavator in a stable location with a clear swing path.
- Remove Topsoil Carefully – Start with a shallow scrape to avoid hitting anything unexpected.
- Dig in Layers – Work in passes, going deeper gradually to maintain control.
- Watch for Signs of the Tank – Look for concrete or fiberglass surfaces as you approach depth.
- Use a Spotter – Have someone guide you from outside the cab for safety and accuracy.
- Stop at the Lid – Avoid direct contact with the tank to prevent cracks or damage.
Summary: A steady, layered approach to septic tank digging helps avoid damage and keeps the excavation safe.
Safety Tips & Disclaimers
- Always Consult a Professional – Septic systems are complex, and improper digging can cause expensive damage.
- Identify All Lines & Pipes First – Striking a water or gas line can be dangerous and costly.
- Have a Plumber On-Site – Just like we did, have a licensed professional present during septic tank digging.
- Operate Equipment Responsibly – Follow the manufacturer’s guidelines for your mini excavator.
Summary: Safety is the most important part of any digging project — especially with septic systems. Always err on the side of caution.
Mini Excavator Tips for First-Time Septic Tank Digging
- Practice Before the Dig – Get familiar with the controls in an open area.
- Choose the Right Bucket Size – A smaller bucket reduces the chance of damaging pipes or the tank.
- Work Slowly Near the Tank – Precision is key in the last foot of digging.
- Keep Soil Piles Manageable – You’ll need to backfill the hole later.
Summary: Even for beginners, using a mini excavator for septic tank digging is straightforward with the right preparation and care.
Why We Recommend the MX15RX — and Other Mini Excavators
While the MX15RX was our go-to machine for this project, we also sell a large variety of mini excavators suitable for residential and light commercial work. Our inventory includes different digging depths, widths, and horsepower levels to fit your specific needs. Many of these are available through our eBay page, giving you convenient purchasing options.
Summary: Whatever your project size, there’s a mini excavator in our lineup that can handle your septic tank digging needs.
Final Thoughts on Septic Tank Digging with a Mini Excavator
Using the MX15RX mini excavator transformed our septic tank access project from a backbreaking multi-day chore into a quick, controlled job. By planning ahead, consulting a plumber, and working carefully, we avoided damage to the tank and surrounding utilities.
If you’re facing a similar project, a mini excavator can save you significant time and effort while improving precision and safety. Just remember:
- Always mark your utilities.
- Have a professional involved.
- Work slowly and methodically.