Do I need a fire hydrant nearby?

Yes. We need access to a fire hydrant to supply the water that our pumper truck flows through your system during the test. As part of pre-test planning we confirm the nearest hydrant locations and the fire department connection (FDC), and we handle the hydrant hookup and coordination.

Will testing disrupt building operations?

Minimal disruption. Water discharge is controlled and directed away from the building. The system is taken out of service briefly during testing, and we coordinate with your fire alarm monitoring company and property manager in advance.

What happens if the system fails the test?

A failed test doesn't mean catastrophe, it means you've caught a problem before it mattered. The deficiency is documented in the test report, and we can refer you to a qualified fire protection contractor for repairs. The test is then repeated after corrective work.

Is a test report included?

FLOW produces and sends the report: test data, calculations, photos, and results for AHJ or insurance submission.

Can FLOW perform the field test if my building requires a licensed fire-protection contractor’s final report?

Yes. FLOW performs the field testing and provides the test data, calculations, photos, and results. FLOW produces and sends the report to the AHJ, insurer, or owner you name.

Standpipe Testing: NFPA 25 Standpipe Flow Test

A standpipe flow test verifies that your building's standpipe system can deliver the required water volume and pressure at the topmost hose outlet during a fire emergency. Without testing, you have no way of knowing whether your system meets NFPA 14 and NFPA 25 requirements, or whether it will function when lives depend on it.

What Is a Standpipe Flow Test?

A standpipe flow test is a performance verification of your building's standpipe system, the fixed piping network that delivers water to hose connections on every floor of a multi-story building. The test confirms that the system can supply the minimum required flow rate (typically 500 GPM from the most remote hose valve, plus 250 GPM from each additional standpipe up to 1,000 GPM total for Class I and III systems) at the required residual pressure (100 PSI minimum at the topmost outlet).

Testing is performed by connecting flow measuring equipment to the hose valves, pressurizing the system with our pumper truck supplied from a nearby fire hydrant, and measuring actual performance against the NFPA 14 and NFPA 25 design criteria.

Standpipe Inspection vs. Standpipe Testing

Standpipe inspection is a visual check that the system's parts are in place and in good condition. Standpipe testing moves water or pressure through the system to prove it performs. Inspection finds visible problems, but only the flow test proves the riser delivers its designed flow at the required residual pressure.

Virginia enforces NFPA 25-2020 through the 2021 Statewide Fire Prevention Code. The recurring standpipe tasks, and how often each is due, are listed below. Confirm the intervals for your building with your AHJ.

Inspection, annually: hose connections and caps, and piping and system components.
Testing, annually: a main drain test at the low point of each standpipe, and a partial-flow test of pressure-regulating devices.
Testing, every 5 years: the flow test at the hydraulically most remote outlets, the hydrostatic test on dry, semiautomatic-dry, and manual-dry standpipes, and a full-flow test of pressure-regulating devices.

Why Is It Required?

NFPA 14 (2019 edition in Virginia) requires flow testing at system acceptance (new construction). Ongoing inspection, testing and maintenance — including the 5-year flow test — follows NFPA 25 (2020 edition in Virginia). Beyond the code requirement, testing is the only way to catch degradation, like clogged piping, failed pumps, closed valves, or supply issues, before they matter.

In Virginia, the 2021 Construction Code (USBC) §905.2 adopts NFPA 14 for installation and acceptance testing. Ongoing ITM follows NFPA 25, 2020 edition, as referenced in the 2021 SFPC Chapter 80. Similar adoption patterns exist in Maryland, DC, North Carolina, and South Carolina — confirm editions with your AHJ.

Who Needs Standpipe Flow Testing?

Standpipe flow tests are required for a wide range of buildings. If you're not sure whether your building qualifies, we can help you determine your obligations.

In Virginia: buildings with four or more stories above or below grade plane, or where the highest floor is more than 30 ft above the lowest fire-department vehicle access (2021 Virginia Construction Code §905.3.1). Other states set their own thresholds; confirm with your AHJ.
Commercial high-rises and mixed-use towers
Hospitals, hotels, and dormitories
Malls and covered mall buildings
Parking structures over certain thresholds
Any building with an installed Class I, II, or III standpipe system

What to Expect During the Test

1
Pre-test coordination: we review your drawings, identify the most remote hose valve, and confirm pumper truck and fire hydrant access.
2
On-site setup: pumper truck staged and connected to a nearby fire hydrant, flow measuring equipment (pitot tube or flowmeter) connected to test hose valves.
3
Performance test: system pressurized to required flow, measurements taken at test outlets and documented.
4
Report delivery: FLOW produces and sends the report with complete field data for AHJ submission or insurance records.

Code References

NFPA 14 — 2019 edition (Virginia)

Standard for the Installation of Standpipe and Hose Systems. Governs design, installation, and acceptance testing.

NFPA 25 — 2020 edition (Virginia)

Standard for Inspection, Testing, and Maintenance. Mandates 5-year flow test intervals for existing systems.

USBC § 905.2 (Virginia)

Virginia Uniform Statewide Building Code (2021 Construction Code) adopts NFPA 14 for standpipe installation and acceptance testing.

2021 Virginia SFPC

Ongoing inspection, testing and maintenance follows NFPA 25, 2020 edition (referenced in Chapter 80).

Related Planning Resources

5-Year standpipe flow test planning checklist — A practical coordination guide for property managers and facility teams before scheduling.
Hydrostatic pressure testing — Pressure-test planning for repaired, altered, or newly installed fire-protection piping.
Fire hydrant flow tests — Hydrant flow and residual-pressure data used for testing coordination and water-supply planning.
Standpipe flow testing in Virginia — Adopted code, enforcement, and the cities and counties we serve in our home state.
The hidden cost of a failed flow test at CO — What a failed flow test late in a project can do to a certificate of occupancy schedule.

Frequently Asked Questions

Most tests take 3–6 hours on site depending on building size, number of risers, and access logistics. Pre-coordination (drawings review, site walk) typically happens in advance. Report delivery follows within a few business days.

Schedule Your Standpipe Flow Test

Standpipe Testing: NFPA 14 & 25 Standpipe Flow Tests in MD, VA, DC, NC & SC