ZURN PEX® RESIDENTIAL FIRE PROTECTION SYSTEMS
INSTALLATION INSTRUCTIONS
3
STANDARDS, RATINGS, AND CERTIFICATIONS
Zurn Fire Protection PEX tubing, fittings and copper crimp ring
systems are UL 1821 listed for use in multipurpose systems as
described in NFPA 13D.
Zurn PEX products are manufactured in accordance with ASTM
F876, ASTM F877, ASTM F1807, ASTM F2159, and CSA B137.5
standards and are listed by NSF International as such.
Zurn PEX products are listed to NSF International Standards
14 and 61.
Zurn PEX systems carry the following pressure and
temperature ratings:
• 160 psi at 73°F
• 130 psi at 120°F (Fire Protection Rating)
• 100 psi at 180°F
• 80 psi at 200°F
TYPES OF MULTIPURPOSE
FIRE PROTECTION SYSTEMS
There are three types of multipurpose systems as described
in NFPA 13D-Standard for the Installation of Sprinkler Systems
in One and Two Family Dwellings and Manufactured Homes. A
multipurpose fire protection system can be installed in accordance
with any of these three systems or a combination of each in
accordance with NFPA 13D.
Gridded
System is set up as a grid and is the preferred
system type because of its simple design and
superior hydraulic characteristics. Sprinklers
are supplied with water from both sides, while
branch lines help transfer water.
Looped
Outer sprinklers on the perimeter of the
floor level are connected in a loop so water is
supplied from both sides. Sprinklers within the
loop are supplied with branch tee connections
o the loop.
Straight
Sprinklers are supplied with water in only one direction. Hydraulic
characteristics are not as good as other designs, therefore this
method is not widely used.
SYSTEM DESIGN
Design of a residential fire protection system shall be in accordance
with all requirements of the NFPA 13D standard. Construction
plans, including sprinkler head locations, piping layout, and
hydraulic demand data, should be submitted to the local authority
having jurisdiction for approval prior to installation. Any deviations
or changes in the plans after approval shall have permission by the
same authority.
Product Descriptions
SPRINKLERS
Only sprinklers listed in accordance with NSF 61 can be used
in Zurn PEX multi-purpose systems. In addition, the sprinkler
must meet the requirements of NFPA 13D, specifically UL 1626 –
Residential Sprinklers for Fire Protection Service.
Residential sprinklers operate under various temperatures ranging
from 150°F to 175°F. In addition, all sprinklers vary in their specific
K-value, wetting density capability, flow volume, and operating
pressure at a specified design coverage area. Sprinklers are
available for various installations, and it is up to the designer to
specify the appropriate sprinkler and its operating conditions.
Do not store sprinklers, sprinkler cover plates, or sprinkler
accessories in areas that may experience excessive heat over 100°F.
Concealed Sprinklers
These sprinklers are flush against the ceiling and are covered with a
special cover plate. In operation, the plate falls o at approximately
135°F and as the heat increases the sprinkler operates. It is
important to never paint over the special cap. It may interfere with
the operation of the sprinkler.
Recessed Pendent Sprinklers
These sprinklers are visible on the ceiling and do not have a cover
plate. In operation, high heat in the range of 150°F to 175°F will
cause the sprinkler to operate.
Recessed Horizontal Sidewall Sprinklers
These sprinklers are visible on the wall and do not have a cover
plate. In operation, high heat in the range of 150°F to 175°F will
cause the sprinkler to operate.
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