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Trade walkthroughs

How to inspect a fire sprinkler system

A fire sprinkler system is life-safety scope, and the tests that count — the hydrostatic test and the acceptance test — belong to the licensed fire protection contractor and the AHJ. Your walkthrough verifies against the approved drawings and documents the install, so the head that was moved under a duct or the hanger that was skipped gets caught before the contractor's test, not after a wall is closed over it.

For the GC's superintendent and QC manager documenting sprinkler rough-in and coverage alongside the fire protection contractor — never a substitute for the contractor's hydro test or the AHJ's acceptance.

Step by step

  1. Verify the layout against the approved drawings

    Walk the piping and head layout against the AHJ-approved sprinkler shop drawings and hydraulic calculations. Coverage, spacing and the location of every head should match what was approved, not what fit around the other trades.

  2. Check pipe support and hangers

    Piping should be supported and braced at the required spacing with listed hangers, with seismic bracing where the design calls for it. A run hung off another trade's strut or left unbraced is a flag for the contractor.

  3. Confirm head type, position and clearance

    Heads should be the type and temperature rating the design specifies, positioned for their spray pattern, with the clearance below them that the listing requires. Watch for heads blocked or crowded by ductwork and light fixtures added later.

  4. Observe the hydrostatic test

    The licensed contractor pressurizes the system to the required hydrostatic test pressure and holds it for the required period. Observe and photograph the gauge holding with no drop and no leaks — the contractor runs and certifies the test; you document that it held before cover.

  5. Log penetrations and firestopping

    Every pipe through a rated wall or floor needs its listed firestop system; record each penetration for the firestopping walk. Escutcheons and cover plates should be the listed assembly, not a field substitute.

  6. Document the acceptance test and closeout

    The final acceptance test — main drain, flow and supervisory alarm signals, and any interface with the fire alarm — is run by the contractor and witnessed by the AHJ. Collect the contractor's certified test and material certificates rather than signing off yourself.

What gets missed

  • Assuming a walk-through covers the required hydrostatic and acceptance tests — those are the licensed contractor's, witnessed by the AHJ.
  • Heads relocated to dodge a duct or fixture without the change routed back through the fire protection contractor and the calc.
  • Missing seismic bracing where the design requires it, buried above a hard ceiling.
  • Sprinkler pipe penetrations of rated assemblies left open for the firestopping walk.
  • Covering piping before the hydro test is witnessed and its gauge photographed.

Questions people ask

Does our inspection replace the hydro or acceptance test?
No. The hydrostatic test and the acceptance test are run and certified by the licensed fire protection contractor and witnessed by the AHJ. Your walk documents the install and observes the tests so nothing fixable is missed beforehand.
What is checked at sprinkler rough-in versus final?
Rough-in verifies the concealed piping, bracing and head locations against the approved drawings before cover; the final confirms the completed system with its heads, escutcheons and the witnessed acceptance test.

Standards behind it

Terms worth knowing

Checklists that make this a one-tap job

Free, field-ready checklists, each with the photo every item needs before it can be submitted.

Fire Protection Rough-in· Fire ProtectionFire Protection rough-in inspection checklistPiping, hangers and head locations verified against the reflected ceiling before rough-in sign-off7 items11 photosFire Protection Pre-cover· Fire ProtectionFire Protection pre-cover inspection checklistHydrostatic test held and head clearances verified before the ceiling closes above the system4 items8 photosFire Protection Final· Fire ProtectionFire Protection final inspection checklistHeads, escutcheons, spare stock and system interface verified before the AHJ final and turnover6 items9 photosWet sprinkler riser AnnualWet sprinkler riser annual maintenance checklistFull main-drain test, alarm verification and valve operation on the deeper annual inspection5 items8 photos
See the whole checklist library

Related guides

Reading the steps is one thing. Proving you walked them is the job.

RTI holds the submit button until every mandatory item is answered and the photos are attached, then chains the record so it can be proven untouched later.

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