Replace Failed Tanks Before Damage Spreads

Septic Tank Replacement in Manteno & Northeastern & East-Central Illinois

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When your septic tank develops cracks, the baffles collapse, or the structure deteriorates to the point where wastewater leaks into surrounding soil in Manteno, replacement becomes the only reliable solution. Allied Water Services removes the failing tank, disposes of it properly, and installs a new tank that's correctly sized for your household and positioned to work with your existing or upgraded leach field. You'll have a watertight tank that prevents contamination, meets current code standards, and restores your system's ability to separate solids from liquids before wastewater reaches the leach field.


Tank replacement starts with excavation to expose the old tank and disconnect inlet and outlet pipes. The damaged tank is carefully removed to avoid collapsing the surrounding soil, and the excavation is inspected for any issues that could affect the new installation. The replacement tank is set on a stable gravel base, leveled precisely, and connected to your home's plumbing and the leach field with properly pitched pipes. Baffles and risers are installed as part of the new tank setup, and the site is backfilled once inspections confirm everything is sealed and functioning correctly.


If you're dealing with a cracked tank or one that's undersized for your household in Manteno, learn more about replacement options and schedule an evaluation.

What's Included in This Service

Septic tank replacement in Manteno involves more than swapping out a damaged component. The old tank is excavated, pumped if needed, and removed from the site following environmental disposal regulations. The excavation is inspected for signs of soil contamination or structural issues that could affect the new tank's stability, and any necessary repairs to the foundation or surrounding area are completed before the new tank is placed.


The new tank is selected based on your household size, daily wastewater volume, and local code requirements, ensuring it provides adequate capacity and settling time for solids. Allied Water Services installs the tank with inlet and outlet baffles that control flow and prevent scum or solids from entering the leach field. Risers are added to bring access points to ground level, making future pumping and inspections easier without extensive digging.


Once the tank is in place and all connections are sealed, the system is tested for leaks and proper flow before backfilling begins. Final inspections are coordinated with local authorities to verify compliance, and you'll receive documentation showing the new tank meets current standards. If your old tank was undersized or your leach field also needs attention, those issues are addressed as part of the replacement process to prevent future failures.

Homeowners considering tank replacement often have specific questions about timing, costs, and what the process involves.

How Our Process Works

  • What are the signs that a septic tank needs replacement?

    Visible cracks, rust holes, collapsed baffles, persistent leaks, or structural failure that allows solids to escape all indicate replacement is necessary. Tanks that are undersized for your household also benefit from upgrading to a larger capacity.

  • How long does septic tank replacement take?

    Most replacements are completed in one to two days, including excavation, removal, installation, and backfilling. Inspection scheduling may add a few days before the site is fully restored.

  • What happens to the old septic tank?

    The old tank is pumped, removed from the excavation, and disposed of according to environmental regulations in Manteno. Concrete tanks are often crushed and recycled, while steel tanks are scrapped properly.

  • Why would a tank need to be upsized during replacement?

    If your household has grown, you've added fixtures, or your original tank was undersized, a larger tank provides the settling time needed to separate solids from liquids effectively. Undersized tanks lead to frequent pumping and premature leach field failure.

  • What is the cost difference between repairing and replacing a tank?

    Minor repairs like replacing a baffle or sealing a small crack can be cost-effective, but tanks with structural damage, widespread cracking, or significant rust are better replaced to avoid repeated failures and leach field contamination.

A new septic tank eliminates leaks, restores proper wastewater treatment, and ensures your system meets current code requirements without ongoing issues. Get in touch to schedule your septic tank replacement in Manteno & Northeastern & East-Central Illinois.