www.senjusprinkler.com
Document No. U028837 • 01-26-2022
Page 1 of 8
The Model ZN-RES Residential Flush Pendent Sprinklers are automatic sprinklers of the compressed fusible solder type.
They are decorative, low profile, flush mount sprinklers. The Frame and Cover of the sprinkler hide the Deflector and Valve
Cap assemblies. (Reference Figure 1) The Model ZN-RES is designed for use in residential occupancies such as homes,
apartments, dormitories, and hotels. When aesthetics is the major consideration, the Model ZN-RES should be your first
choice.
They are to be used in wet pipe residential sprinkler systems for one- and two-family dwellings and manufactured homes
per NFPA 13D; wet pipe residential sprinkler systems for residential occupancies up to and including four stories in height
per NFPA 13R; or, wet pipe sprinkler systems for the residential portions of any occupancy per NFPA 13.
The Model ZN-RES has a 4.2 (60.5 LPM / bar
1/2
) K-factor which provides very low design flow rates at reduced residual
pressures, enabling smaller pipe sizes and water supply requirements.
The flush design of the Model ZN-RES features a separable escutcheon providing 3/8 inch (9.5 mm) vertical adjustment.
This adjustment reduces the accuracy to which the fixed pipe drops to the sprinklers must be cut to help assure a perfect
fit installation.
The Model ZN-RES has been designed with heat sensitivity and water distribution characteristics proven to help in the
control of residential fires to improve the chance for occupants to escape or be evacuated. However, residential fire
sprinkler systems are not a substitute for intelligent fire safety awareness or fire safety construction required by building
codes.
G E N E R A L D E S C R I P T I O N
Residential Flush Pendant Sprinkler
(PTFE gasketed orifice seal design)
Model ZN-RES
K-Factor: 4.2
•
SIN: SS4421
WA R N I N G S
The Model ZN-RES Residential Flush Pendent Sprinklers described herein must be installed and maintained in
compliance with this document, as well as with the applicable standards of the National Fire Protection Association,
in addition to the standards of any authorities having jurisdiction. Failure to do so may impair the integrity of these
devices.
