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what is a 5-year internal inspection?

Every five years, NFPA 25 requires an internal assessment of your sprinkler system to make sure nothing inside the pipes is blocking water flow. We’re not just looking — we’re opening it up, inspecting it from the inside, and showing you what’s going on before it becomes a problem.

Sprinkler piping with multiple valves – commercial fire sprinkler assembly used in internal inspections.
Magnifying glass icon – inspection of system valves, risers, internal piping and FDC.
What We Inspect during an Internal Inspection

✓ System Valves

✓ Risers, cross mains, and branch lines

✓ Internal piping (via section cuts or camera)

✓ Gauges and water storage tanks

✓ Fire Department Connections (FDC)

✓ Obstructions: corrosion, scale, or buildup

✓ Sprinkler heads and valve trims

Clipboard icon – final report with recommendations and compliance documentation.
What to Expect After the Inspection

✓ A detailed report with photo documentation

✓ Expert recommendations and solutions

✓ Full documentation to support your compliance
✓ Peace of mind knowing your system is ready

Why it actually Matters

Sprinkler pipes carry water — and over time, that water can leave behind rust, sediment, or microbial growth. You won’t see it from the outside. But inside? It can look like this ↓ 

Corroded sprinkler pipe interior – pipe cross-section showing rust and sediment buildup inside a fire sprinkler system.
If left unchecked, these blockages can:

 â“§ Prevent water from reaching sprinklers during a fire

 â“§ Reduce system pressure or delay activation

 â“§ Trigger costly pipe replacements or system failures

 â“§ Lead to failed inspections and emergency shutdowns

 â€‹â€‹â€‹

don't wait for a failure

Most systems look fine on the outside — until there’s an emergency.​​
Contact Us Today

Ready to experience the Alltron Systems difference? Contact us today for a free consultation or to learn more about how we can assist you in maintaining a safe and compliant environment.

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