User Guide

72 l uponorengineering.com
Expansion and contraction control with PEX-a
Pipe Support
When properly installed, Uponor PEX-a Pipe Support can
reduce linear expansion and contraction by up to 93 percent
when compared to bare-PEX pipe. For more information, refer
to Table 5-15 on Page 59.
Refer to the following requirements.
• 300-lb., tensile-rated, stainless-steel straps (included)
• Fixed anchor points installed every 65 ft. for domestic hot-
water applications (ΔT>40˚F)
• Fixed anchor points installed every 150 ft. for domestic cold-
water applications (ΔT>40˚F)
Figure 6-24: Uponor PEX-a Pipe Support with
nylon-coated, stainless-steel strapping
ASTM E84 requirements for PEX-a Pipe Support
Uponor PEX-a Pipe Support has been tested and approved for
use in ASTM E84 applications. To meet the requirements, PEX-a
Pipe Support must be installed per the following requirements:
• Pipe or ttings without PEX-a Pipe Support shall be covered
with a minimum ½" thick insulation.
• There is no minimum segment length of PEX-a Pipe Support.
When installed per the above requirements, there are no
spacing limitations between parallel piping runs.
Note: The above requirements also apply to PEX-a Pipe
Support installed in a vertical position for ASTM E84
applications.
Note: Exposed sections of ½" and ¾ Uponor PEX pipe can
be installed un-insulated if the pipe runs are separated by a
minimum of 18".
Figure 6-23: PEX-a Pipe Support
installations in ASTM E84 applications
Rated insulation
ProPEX fitting
Uponor PEX pipe
Uponor PEX-a Pipe Support
Exposed section must be insulated