Overview
The Reliable R1025 SSU D1 upright fire sprinkler head is a standard-response, standard-coverage automatic fire sprinkler designed for wet piping systems. With its 286°F (141°C) activation temperature and 5.6 K-Factor rating, the Reliable R1025 delivers dependable fire suppression performance across light, ordinary, and extra hazard occupancies. The unit features a compact, low-profile design with a heat-sensitive fusible link assembly and 1/2″ NPT connection for easy installation on standard fire protection piping.
Key Features
- Heat-Activated Fusible Link Assembly: Automatic operation triggered at precisely 286°F (141°C) ambient temperature
- Standard Response, Standard Coverage: Suitable for all hazard occupancies (Light, Ordinary, Extra)
- 5.6 K-Factor: Professional-grade discharge coefficient for effective water distribution
- 1/2″ NPT Thread Connection: Compatible with standard wet piping systems
- Brass Frame & Deflector: Durable construction for long service life
- Compact Design: Low-profile upright orientation for exposed mounting
- Industry Certifications: UL, FM, LPCB, EC, and UKCA listed
Technical Specifications
- Model: R1025 (Reliable Model G Series)
- Activation Temperature: 286°F (141°C)
- K-Factor: 5.6 gpm/psi^0.5
- Thread Size: 1/2″ NPT
- Maximum Working Pressure: 175 PSI (12 BAR)
- Orientation: Upright (exposed)
- Thermal Element: Heat-sensitive fusible link
- Frame Material: Brass
- Deflector Material: Brass
- Response Type: Standard Response
- Coverage Type: Standard Coverage
- Installation Torque: 14 ft-lb (19 N-m) maximum
- Certifications: UL, FM, LPCB, EC, UKCA
Typical Applications
The Reliable R1025 is commonly specified in:
- Wet pipe automatic sprinkler systems in industrial facilities
- Commercial buildings and office spaces
- Warehouses and storage areas
- Manufacturing plants and production floors
- Institutional facilities requiring NFPA 13 compliance
- Ordinary hazard occupancy classifications
- Light hazard occupancy classifications
Compatibility & Replacements
Compatible With
- Wet pipe fire suppression systems (NFPA 13 standard)
- Standard 1/2″ NPT female threaded piping
- Reliable™ fire sprinkler system components and accessories
- Buildings and facilities with fire protection requirements
- Systems designed for 286°F (141°C) temperature rating
Replaces / Drop-In Replacement For
The Reliable R1025 is available in multiple configurations across finish types and activation temperatures. Other R1025 configurations include:
- R1025 135°F (57°C) – Brass, Chrome, White
- R1025 165°F (74°C) – Brass, Chrome, White
- R1025 212°F (100°C) – Brass, Chrome, White
- R1025 286°F (141°C) – Brass, Chrome, White
When ordering replacements, verify the original activation temperature, finish type, and piping connection to ensure compatibility.
Works With
- Reliable™ D-1 Guard (UL listed head guard protection)
- Reliable™ C-1 Guard (FM listed head guard protection)
- Reliable™ C-3 Guard with Water Shield (UL and FM listed)
- Reliable™ W-2 Fire Sprinkler Installation Wrench
- Standard fire protection system monitoring equipment
- NFPA 13 compliant wet pipe systems
