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ZURN PEX, INC.
HIGHWAY 11 EAST, COMMERCE, TEXAS, U.S.A. 75428 • PHONE: 855-ONE-ZURN (855-663-9876) • FAX: 903-886-2583 • www.zurn.com
Zurn PEX
®
Plumbing Installation Guide
Hose Bibb Connection
Important:
Zurn PEX cannot support a hose bibb/hydrant. A drop-
ear elbow or metal pipe must be used to support a hose bibb.
A hose bibb/hydrant supported by the structure can be supplied
directly by Zurn PEX.
1/2
"
Zurn PEX
QCR3X
QQDE33BFGX
Q1341
1/2
"
Zurn PEX
QQ650CX
QCR3X
Q1345
Top Out Installation
, continued
Water Line Disinfection
Some code jurisdictions require disinfection of potable water service
lines. The most commonly used standard is AWWA C-601-81, which
specifies a chlorine concentration of at least 50 milligrams/liter
(50 ppm) for 3 hours. The Southern Building Code Congress recom-
mends 50 ppm for 6 hours. Zurn PEX will not be adversely affected
by this exposure, but care should be exercised to avoid use of high
chlorine concentrations (above 300 ppm) for more than 12 hours,
as this could damage the pipe. The system should be thoroughly
flushed at the end of any disinfection period.
Pressure Testing
All Zurn PEX systems must be pressure tested in accordance with
local codes after installation.
Water
If water is used for pressure testing and the building is
unheated, the system should be drained after testing to prevent
freezing. Test pressure shall be at least equal to normal operating
pressure but not less than 40 psi and not more than 225 psi. Test
duration should not be less than 15 minutes.
Air
If air is used for pressure testing, use a pressure no less
than 40 psi but not more than 125 psi. The most common test
pressure is 100 psi. The system shall be tested for a minimum
of 15 minutes and the pressure shall not drop more than 8 psi
in one hour. This is due to initial deformation of tube followed by
slow expansion. Should the system lose over 8 psi in one hour,
repressurize and test again. Should the problem persist, use one
of the soapy solutions below for leak detection. Replace the fitting
and retest.
Leak Detector
For leak detection, use a diluted solution comprising of 2 oz.
per gallon using any of the these dishwashing detergents:
Ultra Palmolive
®
Original Scent, Joy
®
Dish Detergent,
or Great Value Dish Detergent.
Zurn PEX Installation Precautions
When installing a Zurn PEX system we recommend following the
practices listed below to maximize the life of the system.
• 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 inches of any gas appliance
single wall vent. The exception is when a double walled B-vent
is used, which has a minimum clearance of one inch.
• It is acceptable to run Zurn PEX tube next to normal HVAC
ductwork, provided the tubing cannot be cut or abraded by
sharp edges on the ductwork.
• It is acceptable to install Zurn PEX tubing within 12 inches 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.
• Zurn PEX tubing should not be exposed to or stored in direct
ultraviolet light.
• It is the responsibility of the installer to avoid mixing polybutylene
and Zurn PEX components, which may cause plumbing system
failure and result in severe water damage.
