Sprinkler System Reliability & Compliance

All work is performed in alignment with NFPA 25 and applicable CAN/ULC standards.

Why End-of-Line Fire Sprinkler Flushing Matters

These photos are from a recent follow-up to a five-year internal inspection of a fire sprinkler subsystem. During the inspection, a significant amount of debris and evidence of M.I.C. (Microbiologically Influenced Corrosion) was identified within the system.

As is often the case, the most impacted areas were the end-of-branch lines, where sediment, corrosion by-products, and biological material naturally accumulate over time. If left unaddressed, these conditions can lead to restricted water flow, accelerated component deterioration, and reduced system performance during a fire event.

The appropriate corrective action was a full system flush, with particular focus on the end-of-line piping. The flushing process restored water clarity and helped return the system to a reliable operating condition.

Credit to EWF (Earth, Wind & Fire) for completing the work professionally and efficiently, including thorough cleanup upon completion. This is especially important when work is performed in an active parkade.

Inspections only add value when deficiencies are corrected. Proactive flushing plays a critical role in maintaining fire sprinkler system reliability and overall life safety.

Before & After — NFPA 25 PRV Compliance Upgrade

As part of the NFPA 25 five-year pressure-reducing valve (PRV) testing requirements, this fire protection system needed to be brought into full compliance.

• 🔍 EWF identified the requirement for periodic PRV testing under NFPA 25, which mandates full-flow testing every five years to verify proper pressure regulation.
• 🔧 Our fitters installed proper PRV test ports and piping to allow accurate full-flow testing and future compliance.

A solid example of inspection findings and field work coming together to support safe, testable, code-compliant systems.