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Senju Residential Fire Sprinkler 4.9K Concealed Pendent 162F | SS8421

Senju CN-RES Residential Fast Response Concealed Pendent Fire Sprinkler activates at 162F (72C) to defend ordinary hazard residential occupancies against fire. This UL-listed fire sprinkler features a 4.9K orifice and a 1/2" (12.7 mm) NPT connection.
  • Buy 50 for $36.22 each and save 7%
  • Buy 100 for $34.28 each and save 12%
  • Buy 500 for $32.33 each and save 17%
Part NumberConstructionConnectionOrifice
SS8421CP162Bronze Frame And Phosphor Bronze Deflector1/2" (12.7 mm) NPT4.9K
Temperature RatingSprinkler WrenchMaximum Working PressureApprovals and Listings
162F (72C)Wrench - Senju Socket Head for HF Heads175 PSI (12.1 BAR)cULus, NSF (NSF-61-G)
Standard orders usually ship within 48 hours

Product Description

Senju CN-RES Residential Fast Response Concealed Pendent Fire Sprinkler delivers decorative, affordable defense against fire in ordinary hazard residential occupancies such as homes, apartments, dormitories, and hotels. Using a heat-activated compressed fusible solder, this automatic fire sprinkler opens when ambient temperatures reach 162F (72C), reducing the likelihood of flashover and facilitating safe evacuation.

Low-profile cover plates mount flush to the ceiling and are available with a painted wood finish, metallic finish, or simple colors. Custom-colored cover plates are available by special order when ordering in quantities larger than 100 units (a $325 paint set-up fee applies). When temperatures near the ceiling reach 140F (60C), the soldered cover plate detaches, exposing the head of the Senju CN-RES concealed pendent fire sprinkler, which activates when temperatures reach 162F (72C).

The Senju Model CN-RES has a 4.9 K-Factor and installs with 1/2" (12.7 mm) National Pipe Thread (NPT), used in fire sprinkler systems throughout the United States. This Residential Fast Response Fire Sprinkler features a copper alloy body, bronze frame, phosphor bronze deflector, and PTFE gasket.

To order the Senju CN-RES with custom cover plates, contact us at 888.361.6662 or fill our our contact form.

With a maximum working pressure of 175 PSI (12.1 BAR), this pendent sprinkler hangs from above-ceiling piping behind a decorative cover plate and may be installed and used in accordance with NFPA 13, NFPA 13R, NFPA 13D and local fire code. Each Model CN-RES sprinkler is made by Senju, Japan's largest manufacturer of fire-suppression products.

This product is UL-listed, and appropriate for use in fire protection systems when accepted by the authority having jurisdiction.

Technical Documents

Click here to view the data sheet for the Senju CN-RES Residential Fast Response Concealed Pendent Fire Sprinkler.

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