2491 W Iliff Ave, Denver, CO 80219

Fire Line Repair and Replacement Across the Denver Metro

An independent, licensed plumbing contractor. Not affiliated with Denver Water or the City and County of Denver.

Denver Sewer and Water repairs, replaces, and maintains the fire suppression water lines serving residential, commercial, and municipal properties across the Denver metro. This covers the lateral running from the tap to a building, the tap connection itself, and the backflow and hydrant components that keep a fire suppression system reliable and code compliant.

  • Residential, commercial, and municipal fire line service.
  • Repair and full replacement of failing fire line laterals.
  • Emergency response when a fire suppression water supply is compromised.
  • Coordination with the water authority and fire authority having jurisdiction.
  • Camera inspection before recommending repair or replacement.

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Sewer Lines
Water Lines
Fire Lines
Storm Drains
Septic Systems

Independent, family-owned. Not Denver Water or a city agency.

Family Owned and Operated, Not the City Utility
Licensed and Insured
Second-Generation Specialists
Fast Response Across the Denver Metro

Why Do Fire Lines Fail, and Why Does Property Type Matter?

Fire lines fail for the same physical reasons any buried water line fails: corrosion, joint separation, settlement, and age-related material breakdown. What differs by property type is how the failure is discovered and how urgently it needs to be addressed. A residential sprinkler line failure is often found during a routine test, while a commercial building's failure can surface during an insurance inspection or a fire pump acceptance test tied to occupancy requirements.

Municipal and larger commercial sites also carry more complex requirements, often involving multiple taps, larger diameter lines, and closer coordination with the fire authority having jurisdiction. A residential single-family fire sprinkler line, by contrast, is a much smaller system but still depends entirely on its supply line being intact.

(720) 935-6221

Signs a fire line needs evaluation

  • A failed backflow test or fire pump flow test.
  • Low or dropping pressure at the fire riser.
  • Wet ground or a soft spot along the known lateral path.
  • An insurance or fire marshal inspection flagging supply concerns.
  • A renovation or occupancy change increasing required fire flow.
  • Visible corrosion or age on an older fire line installation.
  • No documentation of where the fire line runs or when it was installed.
Excavator digging a deep shored trench for a storm drain and fire line at a Denver commercial site
Commercial scale excavation for storm drains, fire lines, and taps.

How We Approach a Fire Line Call

  1. 1

    Understand the property and the system

    We start with what kind of property it is, what fire suppression system it serves, and what triggered the call.

  2. 2

    Evaluate the line

    Pressure testing and, where the lateral is buried and its condition is uncertain, camera inspection establish what is actually happening underground.

  3. 3

    Explain the repair path

    We walk through whether the fix is a targeted repair, a trenchless option for the lateral, or full replacement.

  4. 4

    Complete the work and secure sign-off

    Repairs are completed, tested, and where required, inspected and accepted by the water authority and fire authority having jurisdiction.

Contractor reviewing utility permit plans on a work truck tailgate with locate marks on the pavement
Locates, permits, and the right authority get handled before the first cut.

What Denver Customers Say About Working With Us

Denver Sewer and Water was a great experience. We had been out of water due to a water main leak into the house for 2 weeks. They came out, gave a go
Cathy Mays
We had an underground water valve break on a Saturday. No fun and expensive to fix regardless of the repair company. Nevertheless, greatly apprecia
Daniel Reilly
Very direct and to the point. Extremely efficient and professional.
Sam Hayden

What Drives Fire Line Cost

Property type and system size are the starting point, since a municipal or large commercial fire line carries a different scope than a single-family residential sprinkler supply. Depth, length of run, access, and whether the tap itself is involved all move the number from there.

We evaluate before quoting because a fire line problem can originate at the tap, along the lateral, or at the backflow assembly, and those are different repairs with different scopes.

Call (720) 935-6221 to have the line evaluated for your specific property type.

Frequently Asked Questions

Fire suppression water supply not working right?

Call (720) 935-6221 and tell us what property and system you have.