Reliable LT56C Quick Response (QR) Concealed Pendent (RA5994) Fire Sprinkler Head
This Reliable Quick Response (QR) Concealed Pendent Fire Sprinkler features a glass bulb activating at 212F with a 5.6 K-Factor, and 1/2 in. threads. Each Concealed Pendent head features a Brass Frame, Bronze Deflector, and the Sprinkler Identification Number (SIN) is RA5994. This is a Quick Response (QR), Standard Coverage sprinkler with a maximum working water pressure of 0PSI (UL).
The LT56C Concealed Pendent sprinkler delivers effective, affordable defense against fire. Using a heat-activated Fusible Link assembly, this automatic fire sprinkler opens when ambient temperatures reach 212F, drenching the area surrounding a fire to keep it in its place of origin.
Reliable LT56C Quick Response (QR) Concealed Pendent (RA5994) Sprinkler Head Listings and Approvals
Each LT56C Concealed Pendent sprinkler is made by Reliable, a global leader in fire protection manufacturing. When installed properly, this fire sprinkler head is UL listed. Refer to the datasheet for listings and approvals in specific temperatures and/or applications.
This Concealed Pendent fire sprinkler is designed to connect seamlessly to wet piping systems, providing dependable fire suppression when it matters most. Engineered for high performance, it delivers fast and uniform water distribution during emergency activation. Built for long-term reliability, this sprinkler head requires minimal maintenance and supports quick, straightforward installation. Whether you're replacing an existing unit or installing a new system, this fire sprinkler meets key industry safety standards and enhances overall fire protection efficiency.
Reliable LT56C (RA5994) Concealed Pendent Sprinkler Installation and Other Information
- Care:
Be careful when handling, as over-tightening can damage the 1/2 in. threads or the sprinkler itself. Avoid dropping or exposing the sprinkler to unnecessary impact, which could affect performance. Do not install if the unit appears damaged or compromised in any way. Store in a clean, dry environment to prevent contamination or mechanical damage. Always refer to the datasheet for proper storage and installation guidelines to ensure optimal performance and compliance with safety standards.
- Finishes & Temperatures
This Concealed Pendent sprinkler features a Bronze finish and activates at 212F. Available finish options include Bronze.
Temperature options include 165F, 212F.
- Accessories
The LT56C (RA5994) listed accessories include: Model G5 Cover Plate, Model FC Recessed Sprinkler Wrench, Model W3 Recessed Sprinkler Wrench.


