Tyco RFII Concealed Pendent Fire Sprinkler TY3531 Quick Response 5.6K 155F

The Tyco RFII concealed pendent fire sprinkler TY3531 is a decorative fire protection sprinkler designed for automatic wet pipe systems. Its concealed design features a flat cover plate that hides the sprinkler for a clean ceiling look and is ideal for architecturally sensitive interiors such as lobbies, offices, and retail spaces.

Key Features

• Concealed pendent sprinkler with flat cover plate
• Quick response glass bulb
• K-Factor: 5.6
• Temperature rating: 155F
• 1/2 inch NPT connection

Applications

This concealed sprinkler head is well suited for commercial and hospitality spaces where aesthetic finish is important. Typical uses include:

• Hotel lobbies and corridors
• Office interiors
• Retail environments
• Churches and public meeting spaces

Technical Specifications

• Manufacturer: Tyco
• Model: TY3531
• Series: RFII (Royal Flush II)
• Response Type: Quick Response
• K-Factor: 5.6
• Temperature Rating: 155F
• Thread Size: 1/2 inch NPT
• Concealed cover plate design

Installation Notes

Install this sprinkler per NFPA 13 and all applicable local fire codes. Concealed sprinklers require proper cover plate and retainer assembly installation. Use a sprinkler wrench and follow manufacturer torque guidelines to avoid damage during installation.

For best performance, this product should be installed by a licensed fire protection professional as part of a complete fire sprinkler system design.

Cover plate required: Tyco RFII concealed sprinklers such as TY3531 require a matching RFII cover plate. Use a 135F cover plate with 155F sprinkler heads. Cover plate sold separately.