Reliable™ RA1311 Standard Response (SR) Pendent Sprinkler | 2.8K | White | 286°F | Model F28P3WN
The Reliable™ Model F28 Pendent Fire Sprinkler (SIN RA1311) is a Standard Response, small-orifice sprinkler engineered for dependable fire protection in light and ordinary hazard applications. Featuring a K-Factor of 2.8 (40 metric), this pendent sprinkler delivers efficient, even water distribution when activated. The Model F28P3WN is factory finished in White enamel and equipped with a 5.0 mm glass bulb rated for 286°F (141°C) operation, ideal for areas where higher ambient temperatures are expected.
This sprinkler is designed for installation in wet pipe fire sprinkler systems in accordance with NFPA 13 and related standards. With its compact, low-profile design and durable brass body, the RA1311 provides long-term reliability and precise thermal sensitivity. The 1/2-inch NPT thread connection ensures straightforward installation and a secure fit into compatible fittings or escutcheons.
Each Reliable RA1311 pendent sprinkler is manufactured to the highest quality standards and individually tested to meet stringent performance requirements. The model is UL and cULus Listed and FM Approved for use in both commercial and residential occupancies. It has a maximum working pressure of 175 psi (12 bar) and is designed for horizontal ceiling installation in wet systems.
Finishes and Temperature Ratings:
The Reliable RA1311 pendent sprinkler is available in multiple finishes and temperature ratings to suit various design and environmental conditions. Standard finishes include Brass, Chrome, and White enamel, and temperature ratings include 155°F (68°C), 175°F (79°C), 200°F (93°C), and 286°F (141°C).
Installation and Care:
When installing the F28P3WN sprinkler, use the Model W2 Sprinkler Wrench for proper engagement and to prevent mechanical damage to the frame or threads. Avoid over-tightening or using excessive force, which can compromise performance. Sprinklers should be stored and handled with care to prevent bulb damage or contamination. Do not install any sprinkler that shows signs of mechanical or thermal damage. Follow all installation guidelines in the latest Reliable Bulletin 066 for optimal performance and code compliance.
Listings and Approvals:
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UL Listed
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cULus Listed
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FM Approved
Key Features:
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SIN: RA1311
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Type: Standard Response (SR), Pendent
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K-Factor: 2.8 (U.S.) / 40 (Metric)
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Temperature Rating: 286°F (141°C)
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Finish: White Enamel (also available in Brass and Chrome)
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Max. Working Pressure: 175 psi (12 bar)
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Thread Size: 1/2 in. NPT (ISO 7-R1/2 optional)
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Bulb: 5 mm Glass Bulb
Reliable’s RA1311 (Model F28) pendent sprinkler combines proven dependability, compact form, and thermal precision for effective, economical fire suppression. Ideal for offices, retail environments, light manufacturing, and storage occupancies, it ensures fast and consistent response when it matters most.
