User Guide

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Ultraviolet (UV)
resistance
The test method for evaluating
UV resistance as required by
ASTM F876 is ASTM F2657
Test Method for Outdoor
Weathering Exposure of
Cross-linked Polyethylene
(PEX). According to ASTM
F876, PEX piping must bear
a four-digit code to signify
the requirements it meets.
The second digit in the code
references the minimum
ultraviolet (UV) resistance
of the piping. For example,
piping with a 5106 marking
has a “1” as the second digit,
which indicates the piping
meets minimum UV resistance
requirements for a period of
1 month. Piping with a “2” as
the second digit indicates a
resistance period of 3 months.
For the minimum UV
resistance of all Uponor
AquaPEX products, refer to
Table 1-1.
Note: See page 87 for
handling guidelines regarding
light xtures.
Chemical resistance
PEX has very good resistance
to chemical-dissolving
agents. The unique molecular
structure is stable and inert,
and it is virtually unaffected
by chemicals (organic or
inorganic) commonly found
in plumbing systems. Contact
Uponor Technical Support for
specic chemical compatibility
verication. Review the
Plastics Pipe Institute (PPI)
Technical Report 19 Chemical
Resistance of Thermoplastics
Piping Materials for more
information about the transport
of chemicals.
Oxidative resistance
The test method for evaluating
oxidative resistance as
required by ASTM F876 is
ASTM F2023 Test Method
for Evaluating the Oxidative
Resistance of Cross-linked
Polyethylene (PEX) Piping and
Systems to Hot Chlorinated
Water. According to ASTM
F876, PEX piping must bear
a four-digit code to signify
the requirements it meets.
The rst digit in the code
references the minimum
chlorine resistance at end-use
conditions.
Uponor AquaPEX was
evaluated according to the
ASTM F2023 test method for
evaluating oxidative resistance
to hot, chlorinated water.
This is the most stringent
test method in the industry.
Uponor AquaPEX piping
exceeds the minimum life
expectancy requirement of
50 years when operating with
end-use conditions of 100%
recirculation at 140ºF/60ºC
for potable water. Refer to
page 55 for proper hot-water
system design.
Product Marking UV resistance
Uponor AquaPEX White 5106 1 month
Uponor AquaPEX Blue 5206 3 months
Uponor AquaPEX Red 5206 3 months
Table 1-1: Uponor AquaPEX
®
UV resistance ratings
Note: Uponor AquaPEX purple reclaimed water pipe has not
been tested for UV resistance and therefore retains a 5006 rating.
Property English units SI units
Approximate modules of elasticity
(Secant at 1% and 1% and 73°F/22.8°C)
91,350 psi 630 N/mm
2
Tensile yield strength at 68˚F (20˚C) per DIN 53455 2.76-3.77 psi 19-26 N/mm
2
Piping density 59 lbs./ft
3
936 Kg/m
3
Impact strength
Will not fail under impact
at temperatures of -284°F/-140°C
Water absorption
Room temperature = 0.01%
Boiling for 40 days = 0.07%
Coefficient of friction (surface-roughness factor) 0.000019 inches 0.0005 mm
Surface tension 0.00014 lbs./inches 25 dyne/cm
Recommended working-temperature limits -58°F to 200°F -50°C to 93°C
Short-term maximum temperature 210°F 99°C
Coefficient of linear expansion at 135°F/57°C Ave. = 9.2*10-5 in/in-°F Ave. = 1.7*10-4 m/m-°C
Softening temperature 264°F to 268°F 129°C to 131°C
Specific heat 0.55 Btu/lb-°F 2302.3 J/kg-°C
Coefficient of thermal conductivity 0.219 Btu/(hr•ft•°F) 0.38 W/(m•°K)
Degree of crosslinking 70 to 89% (per ASTM F876)
Minimum bend radius Six times the outside diameter
Table 1-2: Material properties of Uponor AquaPEX piping
Dimensions and physical characteristics of SDR9 PEX pipe
Nominal
pipe size
Pipe I.D.
Weight of pipe only
lbs./ft (kg/m)
Contents of pipe
gal/ft (l/m)
Weight of pipe and
water lbs./ft (kg/m)
¼" 0.241 0.04 (0.06) 0.0024 (0.03) 0.06 (0.089)
⅜" 0.35 0.05 (0.074) 0.005 (0.062) 0.09 (0.136)
½" 0.475 0.06 (0.089) 0.0092 (0.114) 0.14 (0.203)
¾" 0.671 0.1 (0.149) 0.0184 (0.229) 0.25 (0.377)
1" 0.862 0.2 (0.298) 0.0303 (0.376) 0.45 (0.673)
1¼" 1.054 0.34 (0.506) 0.0453 (0.563) 0.72 (1.071)
1½" 1.244 0.44 (0.655) 0.0632 (0.785) 0.96 (1.428)
2" 1.629 0.682 (1.015) 0.1083 (1.345) 1.58 (2.351)
2½" 2.011 0.93 (1.384) 0.1649 (2.048) 2.3 (3.423)
3" 2.4 1.28 (1.905) 0.2351 (2.92) 3.24 (4.821)
Table 1-3: Dimensions and physical characteristics of SDR9 PEX pipe