Standard response sprinkler RFII HSW

for firefightingwaterside mounted

Overview
The Tyco RFII HSW is a concealed horizontal sidewall sprinkler providing standard coverage with a flat cover plate that conceals the escutcheon within the wall. Designed for installation along walls or beams beneath smooth ceilings, its low‑profile cover plate blends with surrounding surfaces for architecturally sensitive interiors.

Key specifications

• Model / Denomination: RFII HSW (horizontal sidewall flat plate concealed sprinkler)
• Orientation: Concealed, Horizontal Sidewall
• K‑Factor: 5.6
• Temperature rating: Up to 212°F (100°C)
• Response type: Quick (Standard Coverage)
• Maximum pressure rating: 250 psi (17.2 bar)
• Thread size: 1/2‑inch
• Wrench: W37
• SIN number: TY3521
• Installation: Fits in a typical 2 x 4 in stud‑frame wall configuration

Features

• Flat cover plate conceals sprinkler for a discreet appearance
• Designed for horizontal sidewall installations along walls or beams
• Compatible with standard 2 x 4 stud‑wall framing
• UL and C‑UL Listed; FM Approved (Standard Response only)

Benefits

• Architectural integration — minimal visual impact in finished interiors
• Reduced accidental activation risk compared with exposed fittings
• Proven performance with longstanding Tyco industry heritage

Applications
Suitable for light hazard and ordinary hazard occupancies. Common uses include commercial offices, hotels, retail spaces, corridors and other architecturally sensitive areas where concealed protection is required.

Certifications & Compliance

• Listings: UL and C‑UL Listed
• Approvals: FM Approved (standard response)

Technical note
See the Technical Data Sheet (TDS) for full installation details, hydraulic performance and listing information. SIN: TY3521. Thread: 1/2‑inch. Wrench: W37.