Underground Plumbing Done Safely and Correctly

Underground plumbing issues require more than basic tools—they demand expertise, precision, and a deep understanding of local infrastructure. At Supreme Plumbing Services, we specialize in underground plumbing and sewer services across the Tri-state Area, delivering safe, code-compliant solutions for homes, businesses, and municipal properties. Whether you’re dealing with a broken sewer line, a leaking water main, or planning new construction, our licensed team is equipped to dig deep and get the job done right.


Call 302-750-0115 to schedule underground plumbing service in the Tri-state Area. We serve Delaware, Maryland, and Pennsylvania communities, including Newark, Elkton, West Chester, and more.

White PVC pipes in a crawl space, connecting to a drain system.

What We Handle Below the Surface

Our underground plumbing services cover a wide range of essential systems that keep your property safe, sanitary, and functional. We use advanced equipment and proven techniques to minimize disruption and maximize long-term performance.

Black pipe emitting into wavy lines, possibly water.

Sewer Line Repair and Replacement

We diagnose and repair damaged sewer lines caused by tree roots, corrosion, shifting soil, or age. When replacement is necessary, we offer trenchless options to reduce excavation and restore flow quickly.

Black plumbing pipe with two elbows and a connecting straight piece.

Water Main Installation and Repair

We install new water mains for residential and commercial properties and repair leaks or breaks in existing lines. Our team ensures proper depth, insulation, and connection to municipal systems.

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Drainage System Installation

We design and install underground drainage systems to prevent flooding, pooling, and foundation damage. This includes French drains, catch basins, and stormwater management solutions.

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Trenchless Pipe Repair

Using cured-in-place pipe (CIPP) and other trenchless technologies, we restore damaged pipes without digging up your yard or driveway. This method is ideal for tight spaces and historic properties.

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Excavation and Utility Locating

We perform safe, accurate excavation for plumbing installations, repairs, and upgrades. Our team uses utility locating tools to avoid damage to gas, electric, and telecom lines.

Signs You May Need Underground Plumbing Service

Underground plumbing issues aren’t always visible—but they often leave clues. If you notice any of the following, it’s time to call a professional:

  • Sewage odors in your yard or basement
  • Slow drains or frequent backups
  • Wet spots or sinkholes in your lawn
  • Unexplained spikes in your water bill
  • Gurgling sounds from toilets or drains
  • Water pressure loss throughout the property

We’ll inspect your system, identify the source of the problem, and recommend the most effective solution.

Person in work gloves cutting white PVC pipe with red tool outdoors.
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Why Choose Supreme Plumbing Services for Underground Work?

Underground plumbing is complex, and mistakes can be costly. Our clients trust us because we offer:

  • Licensed and insured technicians with excavation and utility experience
  • Advanced equipment for diagnostics, digging, and trenchless repair
  • Strict safety protocols to protect your property and surrounding infrastructure
  • Upfront pricing with detailed estimates and no hidden fees
  • Clean job sites and respectful service from start to finish
  • Code-compliant installations that meet local and state regulations

We treat your property like our own and ensure every underground job is done right the first time.

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Serving the Tri-state Area with Local Expertise

We provide underground plumbing services throughout the Tri-state Area, including:

  • Delaware: Newark, Middletown, New Castle
  • Maryland: Elkton, Chester
  • Pennsylvania: Kennett Square, West Chester, Wilmington

Our team understands the soil conditions, utility layouts, and permitting requirements unique to each region.

What to Expect During Your Project

We make underground plumbing projects simple and transparent. Here’s how it works:

1

Initial Consultation We assess your needs and schedule a site visit.

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2

On-Site Evaluation Our technician inspects the issue and explains your options.

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3

Detailed Estimate You receive a written quote before any work begins.

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4

Safe Excavation or Trenchless Repair We complete the job using the safest and most efficient method available.

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5

Final Inspection and Cleanup We test the system, restore the site, and ensure everything meets code.

Schedule Underground Plumbing Service Today

Don’t let hidden plumbing problems threaten your property. Supreme Plumbing Services is here to help—on your schedule, at your location, with the expertise you deserve.



Call  302-750-0115 to book underground plumbing service in the Tri-state Area. Let’s get your system flowing from the ground up.