Wisconsin
Fire Flow and Water Main Analysis
Hydrant flow testing and hydraulic analysis to show a site has enough water for fire protection and domestic use.
What the work involves
Fire codes require a minimum fire flow based on building size and construction type. Engineers use hydrant flow test data and water system models to show whether the existing mains can deliver it, and design main upgrades, loops, booster pumps or storage where they cannot. The analysis is frequently a condition of site plan approval and provides the water supply data sprinkler designers need.
Local conditions we plan for
- Deep frost penetration
- Heavy snow loads
- Great Lakes shoreline erosion
- Karst in the southwest Driftless Area and Door County
Building code: IBC 2021 statewide for commercial buildings; one and two family dwellings use the state Uniform Dwelling Code instead of the IRC (ICC adoption chart, April 2026).
When you need it
- Fire marshal or utility requires fire flow analysis
- Sprinkler design needs water supply data
- Development at the end of a dead-end main
- Low pressure complaints in an area
Frequently asked questions
How much does fire Flow and Water Main Analysis cost?
Across the US, fire Flow and Water Main Analysis usually costs $1,500 to $15,000. Estimate. A flow test and letter is low cost; system modeling and main design cost more.
How long does fire Flow and Water Main Analysis take?
Plan on 2 to 6 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for fire Flow and Water Main Analysis?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
How do I verify an engineer's license in Wisconsin?
Engineers practicing in Wisconsin are licensed by the Wisconsin Examining Board of Architects, Landscape Architects, Professional Engineers, Designers and Professional Land Surveyors. You can confirm a license number and its status in the board's public license search before you sign a contract.
How deep is the frost line in Wisconsin?
Wisconsin Uniform Dwelling Code SPS 321.16 requires footings to be below frost penetration or at least 48 inches below adjacent grade, whichever is deeper (one and two family dwellings). Local building departments set the required footing depth, so confirm the exact figure for your county before designing foundations or retaining walls.
Which building code applies in Wisconsin?
IBC 2021 statewide for commercial buildings; one and two family dwellings use the state Uniform Dwelling Code instead of the IRC (ICC adoption chart, April 2026). Cities and counties can add local amendments, which is one reason to hire an engineer who works in your area.