ZURN PEX® RESIDENTIAL FIRE PROTECTION SYSTEMS
INSTALLATION INSTRUCTIONS
8
Tubing Installation
TUBING SUPPORTS
AND FITTING
• Do not use supports that have sharp
edges which could damage the tubing.
Tube supports should allow free
tubing movement.
• Do not install Zurn PEX within 6" of
any gas appliance single wall vent.
The exception is when double walled
B-vent is used, which has a minimum
clearance of 1".
• It is acceptable to run Zurn PEX
tube next to normal HVAC ductwork,
provided the tubing cannot be cut
or abraded by sharp edges of the
duct work.
• It is acceptable to install Zurn PEX
tubing within 12" of recessed light
fixtures only when insulation has been
installed with the specific purpose
of protecting the tubing from
excessive heat.
• When Zurn PEX tubing is free to
uniformly expand, it is resistant to
freeze damage in an accidental freeze.
However, if Zurn PEX tubing is to be
installed in an area subject to regular
freezing conditions, we recommend
that the tubing be insulated or
otherwise protected as required by
local code.
• Zurn PEX tubing is approved for water
distribution only and should not be
used for distribution of petroleum
based products such as liquid
petroleum (LP) or natural gas.
UNCOILING
ZURN PEX TUBING
For ease of installation Zurn recommends
using the Zurn PEX dual coil uncoiler,
QDISP; the Zurn PEX pipe dispenser, QHD;
or the Zurn PEX portable uncoiler.
SUPPORTING ZURN PEX
DISTRIBUTION LINES
Note: Zurn PEX should be supported or
strapped every 32" when hung from floor
joists or running across rafters. When
supporting tube bundles, use a strap to
support the entire bundle.
Horizontal runs should be supported
every 32".
32”
Always cut the pipe longer than necessary
to allow some slack for any contraction
in the pipe. 1/8" per foot of length is
usually enough.
Strapping support should be firm but loose
enough to allow the pipe to move back and
forth as it expands and contracts.
Straps can be as far as 6' apart if the pipe is
continuously supported.
Vertical runs need support at every
floor level.
Zurn PEX straps and hangers hold pipe
in position and prevent strain on fittings
when the pipe is bent.
Always strap
pipe down
before bending.
Since Zurn PEX tubing expands or
contracts 1" for every 100' of pipe for every
10° of temperature change, you must allow
for expansion and contraction in long runs
with a 12" horizontal oset.
12"
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