Senju® SS8421 Concealed Pendent Sprinkler | Residential | 4.9K | 162F | 001-0801

Senju CN-RES (SS8421) Residential Concealed Pendent Sprinkler

This Senju Model CN-RES Residential Concealed Pendent fire sprinkler features a fusible link activating at 162F (72C) with a 4.9 K-Factor, and 1/2 in. NPT threads. Each concealed pendent sprinkler head features a Copper Alloy Body and Deflector. This sprinkler was designed to be covered by a Senju CN cover plate, allowing for optimal aesthetics within residential settings. The manufacturer part number is 001-0801 and the Sprinkler Identification Number (SIN) is SS8421.

The Model CN-RES Residential Sprinkler delivers decorative, affordable defense against fire and is designed for use in residential occupancies such as homes, apartments, dormitories, and hotels. Using a heat-activated fusible metal assembly, this automatic fire sprinkler opens when ambient temperatures reach 162F (72C), drenching the area surrounding a fire to keep it in its place of origin. This model has a 4.9 K-factor, enabling smaller pipe sizes and water supply in a residential fire sprinkler system.

Senju CN-RES (SS8421) Residential Concealed Pendent Fire Sprinkler Head Listings and Approvals

Each CN-RES sprinkler is made by Senju, Japan's largest manufacturer of fire-suppression products. This flat concealed fire sprinkler head maintains UL Listing.

The SS8421 is a residential sprinkler and is cULus listed for use when installed in accordance with NFPA 13 requirements for wet pipe sprinkler systems and designed for use in residential occupancies. This concealed pendent sprinkler head has a maximum working pressure of 175 PSI (12.1 BAR) UL Listed and connects to ceiling wet piping systems.

Senju CN-RES (SS8421) Residential Concealed Fire Sprinkler Head Installation and Other Information

During installation be aware that over tightening will cause permanent damage to the 1/2 NPT threads and/or the fire sprinklers themselves. Use the manufacturer approved installation wrench and tighten to a maximum torque of 14 ft-lb (19 N-m). Refer to the data sheet for additional storage and installation information.

This flat concealed sprinkler head is available at a temperature of 162F (72C) and must be paired with a Senju CN Cover Plate. These 140F cover plates come in a variety of finishes: White, Ivory, Nickel, Beige, Brown, Black, and multiple Wood Grain options. To choose your cover plate, find the “Options” section at the top of this product page.

Along with the required Cover Plate, SS8421 listed accessories include the VC-H socket wrench, manufacturer part number (90000-003-0300) and the CN Cap Removal tool, manufacturer part number (90000-003-2000). This sprinkler head is commonly purchased with fire sprinkler head cabinets and sprinkler shut off tools. These products are available in the “Frequently bought together” products section at the top of this product page.