User Guide

Plumbing Design Assistance Manual l Chapter 3 – Fire-resistant construction l 25
Figure 3-11: UL online
certications directory
Figure 3-12: Select appropriate features
ASTM E814 or
CAN/ULC-S115
Combustible and non-
combustible pipes penetrating
a wall or oor/ceiling re-rated
assembly must include a
code-compliant means of
passive re protection. The
function of a passive re
protection system, such as
restopping, is to contain
the re within the area in
which it started by preventing
the products of combustion
(smoke, hot gasses and
ames) from spreading
throughout the structure.
Effective restopping requires
accurate adherence to a
specic combination of
conditions that have been
tested and listed as a system
per ASTM E814, CAN/
ULC-S115 or ANSI/UL 1479.
Listed restop components
include the penetrated
substrates, penetrating item,
penetration hole, insulating
materials, sealants and
installation method. Deviation
from the listed re assembly
documentation severely
compromises the effectiveness
of the restop system.
Fire assembly documentation
and listings shall be obtained
from the selected restop
solution manufacturer. Most
of the restop manufacturers
have system selector tools or
navigators on their websites
to easily research and nd
a listing that matches the
specied type of construction.
Fire stopping solutions
There is a wide range of
restopping solutions that
have been tested and listed
with PEX pipe, including
intumescent caulks, wrap
strips, pass-through devices,
collars and cast-in-place
sleeves. Some restop
manufacturers include, but
are not limited to, 3M™, Hilti
®
,
RectorSeal
®
, Passive Fire
Protection Partners, Specied
Technologies Inc., Holdrite
®
and ProSet Systems
®
.
The steps below show an
example of how to research
and nd a listed restop
assembly for PEX pipe.
Step one
Choose a restop solution
manufacturer and consult
their website or search the
UL Online Certications
Directory for applicable
listings. (See Figure 3-11.)
Step two
Select the desired and
specied features of the
through penetration system.
Dening the country of use,
assembly type, penetrating
item, restopping product and
F rating of the system may
help rene search results.
(See Figure 3-12.)
Step three
Review the system matches
for accuracy and consider all
available options. In regards
to re listings for pressure pipe
applications, domestic water
piping (Division 22, Section
22 11 16) and hydronic piping
(Division 23, Section 23 21
13) may be dened as being
“closed” or “pressure” type
systems. (See Figure 3-13 on
the following page.)