Reliable P25 K25.2 ESFR Pendent Fire Sprinkler

You can suppress high-challenge fires quickly by installing the Reliable Model P25 ESFR Pendent Sprinkler in your wet pipe fire protection assemblies. This pendent sprinkler delivers high-volume water suppression directly to the seat of a fire using a nominal K-factor of 25.2 (360 metric).

You satisfy specific life safety and code compliance requirements under NFPA 13 for storage and non-storage design criteria. This component carries a cULus Listing as an ESFR sprinkler and FM Approval as a quick-response storage and non-storage sprinkler when you follow applicable hydraulic, spacing, and commodity design criteria. You must consult Reliable Bulletin 070: Model P25 ESFR Pendent Sprinklers for complete storage, hydraulic, and installation guidelines.

Key Features & Construction

• High-Capacity Delivery: You get a nominal K-factor of 25.2 (360 metric) to supply the heavy water discharge required for aggressive ESFR applications.
• Durable Construction: The brass-alloy frame, bronze-alloy deflector, nickel-alloy solder link, and nickel-alloy sealing assembly with PTFE ensure reliable long-term performance.
• Precise Thermal Activation: The compact levered fusible-alloy solder link is available in 165°F (74°C) and 212°F (100°C) temperature ratings to match your specific environmental design limits.
• Flexible Thread Options: The 1-inch NPT or ISO 7-R1 (BSPT) thread connections integrate directly with your standard piping drops.
• Specialized Tooling & Accessories: You install this using the Model W5 wrench, or the Model W16 wrench when paired with a guard, supporting secure mechanical installation.

Technical Specifications & Compliance Table

You must verify local Authority Having Jurisdiction (AHJ) requirements, spacing rules, and system design criteria before installation. Match your full ordering code, thread type, temperature rating, and sprinkler markings to your specific hazard classification, noting that D-14 guard and S-5 shield configurations are FM Approved exclusively for in-rack or intermediate-level use.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)