Septic System FAQ's
- berresexcavating
- Nov 17
- 3 min read
Below are the most common questions homeowners ask about septic systems. Whether you're installing a new system, replacing an old one, or just want to understand how your system works, we’re here to help. So here are the top 10 most frequently asked questions about septic systems!
1. How does a septic system work?
A septic system is an on-site wastewater treatment system. Wastewater leaves your home and enters the septic tank, where solids settle and begin breaking down. The liquid then flows into the drain field, where it is naturally filtered through soil. The system safely returns treated water back into the environment.
2. How often should I pump my septic tank?
Most septic tanks should be pumped every 3–5 years. Households with more people or higher water usage may need more frequent pumping. Regular maintenance is the key to preventing costly backups and system failures.
3. What can I safely flush or drain into my septic system?
Only flush human waste and toilet paper.
Avoid flushing or draining:
Wipes (even “flushable” ones)
Grease, oil, or fats
Paper towels
Feminine hygiene products
Harsh chemicals or bleach
Cat litter
Everything else should go in the trash, not your septic system.
4. How do I know if my septic system is failing?
Common signs include:
Slow drains or gurgling pipes
Sewage odors inside or outside the home
Wet or spongy spots in the yard
Water pooling over the drain field
Backups into toilets or drains
If you notice any of these symptoms, contact a septic professional immediately.
5. How long does a septic system last?
A well-maintained septic system can last 20–40 years, depending on soil conditions, usage, and overall care. Drain fields typically have shorter lifespans than tanks.
6. How much does a new septic system cost?
Costs vary depending on:
Type of system (mound, trench, drain field, etc.)
Soil type
Size of the system
Local regulations
On average, homeowners in Minnesota can expect anywhere from $16,000 to $30,000+. Feel free to give us a call for a rough estimate. We can also get you set up with a design to get more specific numbers.
7. What type of septic system do I need?
The right system depends on:
Soil testing results
Water table depth
Space available
Local county regulations
Common system types include mound, drain field, trench, or box systems. A licensed designer will determine the best fit for your property.
8. How do I maintain my septic system?
Simple steps to protect your system:
Pump the tank every 3–5 years
Avoid flushing anything except toilet paper
Fix leaky faucets and reduce water usage
Keep vehicles, structures, and trees off the drain field
Schedule regular inspections with a qualified septic professional
Routine care extends system life and saves money.
9. How can I locate my septic tank?
Your septic tank is usually buried a few feet underground near the home. You can:
Look for access lids or risers
Check property records
Ask a previous owner
Contact a septic professional who can locate it with specialized tools
10. Can I drive, build, or plant on my drain field?
No. Your drain field must remain uncompacted, clear, and able to absorb wastewater.
Avoid:
Driving or parking vehicles
Building structures, patios, or sheds
Planting trees or deep-root plants (roots can damage pipes)
Grass is the safest option to grow over a drain field.
Have More Questions? We’re Here to Help.
Berres Excavating specializes in septic system installation, septic replacement, sewer and water hookups, grading, and more across Minnesota.
612-801-6939
Serving the north metro area
Berres Excavating — We Set the Standard.
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