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Underground Fire Main Contractor's Material & Test Certificate (NFPA 24)

A Contractor's Material & Test Certificate for Underground Piping documents the installation, flushing, and hydrostatic testing of a private fire service main per NFPA 24, following the form structure used by AHJs nationwide (e.g. Philadelphia's TP_006_F). It records pipe material/sizing, backflow-preventer forward-flow test, hydrant/FDC thread compatibility, and the leakage test result.

NFPA 24 (Standard for the Installation of Private Fire Service Mains and Their Appurtenances), state/local fire codes and AHJ acceptance-test requirementsValid: One-off (acceptance test, no expiry)

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Sample Underground Fire Main Cert certificate

Sample Underground Fire Main Contractor's Material & Test Certificate (NFPA 24) certificate created with CertBox, showing the professional PDF layout with pipe material, size, and length installed, flushing verification before testing, hydrostatic test result and allowable leakage

Sample Underground Fire Main Cert with fictional data. All personal details shown are fake.

What it covers

  • Pipe material, size, and length installed
  • Flushing verification before testing
  • Hydrostatic test result and allowable leakage
  • Backflow preventer forward-flow test
  • Hydrant/FDC thread compatibility with the responding fire department
  • Owner instruction and equipment-approved attestation

Who needs a Underground Fire Main Cert?

Fire protection/underground contractors
General contractors
AHJ/fire marshal inspectors
Water utilities

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Frequently asked questions about Underground Fire Main Cert

How much leakage is allowed on a new underground fire main?
NFPA 24 allows a maximum of 2 quarts per hour per 100 joints, regardless of pipe diameter, measured during the hydrostatic test.
Why does the form check hose thread compatibility?
NFPA 24 requires that hydrant and fire department connection (FDC) threads be compatible with the responding fire department's equipment — a mismatch can prevent firefighters from connecting hose or supply pumpers in an emergency.

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