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Fire Sprinkler Head Replacement

Time: 19-June 2025 | Source: I-FLOW| Share

When Is It Time to Replace a Fire Sprinkler Head
Fire sprinkler heads may be durable, but they’re not invincible. Over time, even the toughest components face corrosion, dust buildup, or accidental impact. The National Fire Protection Association (NFPA 25) outlines clear signs that it's time to replace them:
  • Discoloration or corrosion around the head
  • Accidental paint or chemical exposure
  • Leaks or visible cracks
  • Physical damage or bent components
  • Sprinkler heads older than 50 years without testing
  • Poor response during inspection or testing
These warning signs aren’t just technicalities—they’re early signals that your fire system may not perform when it matters most.
What You’ll Need Before You Begin
  • A replacement sprinkler head (with identical specs: type, orientation, K-factor, and temperature rating)
  • A sprinkler head wrench specific to the manufacturer
  • Safety goggles and gloves
  • Tape or approved thread sealant (if required)
  • A step ladder or lift
  • Access to the system’s shut-off valve and drain


Step-by-Step: How to Replace a Fire Sprinkler Head Safely
1. Isolate and Drain the System
Start by shutting off the water supply to the affected area. Then, drain the branch line to avoid water spillage when removing the head.
2. Remove the Damaged Sprinkler Head
Use the correct sprinkler wrench. Generic tools can damage the fittings or distort the threads. Turn slowly and steadily—no over-torquing.
3. Clean and Prep the Threads
Inspect the pipe threads for debris, corrosion, or leftover sealant. Clean thoroughly and apply a new layer of thread sealant if recommended by the manufacturer.
4. Install the New Sprinkler Head
Hand-tighten the new head first, then finish with the wrench. Ensure it's snug but avoid cracking the fitting. The orientation (pendant, upright, sidewall) must match the original.
5. Restore and Test the System
Turn the water back on slowly. Check for leaks and test the system according to NFPA 13 or 25 standards to ensure full functionality.
Real-World Tips from the Field
  • Keep spare heads on-site, especially for high-occupancy buildings. NFPA 13 requires at least six spares and a wrench.
  • Label and document every replacement—track the location, date, and specs.
  • Avoid any field painting of sprinkler heads. Even one accidental coat can render a head non-compliant.
  • Never mismatch components. If in doubt, consult your system designer or fire marshal.
How Often Should You Replace Fire Sprinkler Heads
  • Standard sprinklers: Test at 50 years
  • Quick response: Test at 20 years
  • Dry-type: Test at 10 years
  • Exposed to harsh environments: Inspect annually and replace as needed
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