User Guide

Plumbing Design Assistance Manual l Chapter 6 – Installation methods l 69
General requirements for PEX-a Pipe Support
• PEX-a Pipe Support can be used to achieve greater spans
than those shown in Dimension A in the table below.
• Segments of PEX-a Pipe Support that are greater than the
distances in Dimension A in the table below require a minimum
of two supports.
Nominal
pipe size
Spacing for bare PEX (Dimension A) Spacing with PEX-a Pipe Support (Dimension B)
International
codes
(IPC, IMC)
Uniform codes
(UPC, UMC)
National
Plumbing Code
of Canada
(NPCC)
International
codes
(IPC, IMC)
Uniform codes
(UPC, UMC)
National
Plumbing Code
of Canada
(NPCC)
½"
32" 32" 32" 6'-0" 6'-0" 6'-0"
¾"
32" 32" 32" 6'-0" 6'-0" 6'-0"
1"
32" 32" 32" 8'-0" 8'-0" 8'-0"
1¼"
32" 48" 32" 8'-0" 8'-0" 8'-0"
1½"
32" 48" 32" 8'-0" 8'-0" 8'-0"
2"
32" 48" 32" 8'-0" 8'-0" 8'-0"
2½"
32" 48" 32" 8'-0" 8'-0" 8'-0"
3"
32" 48" 32" 8'-0" 8'-0" 8'-0"
Table 6-5: Maximum allowable support spacing for PEX pipe
Scenario 1: No ttings
The following scenario involves Uponor PEX pipe from a coil with PEX-a Pipe Support and no ttings.
• Maximum hanger spacing is 6' to 8' for all pipe segments (per Dimension B in above table).
Figure 6-14: PEX-a Pipe Support without ttings
Scenario 2: Segments with ttings
The following scenario features Uponor PEX pipe with PEX-a Pipe Support and ttings.
• Maximum hanger spacing is 6' to 8' for full-length pipe segments with PEX-a Pipe Support (per Dimension B in above table).
• Hanger spacing changes to Dimension A for tting segment (spacing for area with no PEX-a Pipe Support).
Note: Uponor recommends detailed hanger and support layouts using the above methods for PEX pipe.
Note: Simply placing hangers at a consistent on-center distance (e.g., 6'-0", 6'-0"…) will not provide the full-benets of PEX-a Pipe
Support when using ttings.
• Using the recommended installation methods will allow for the maximum benet of PEX-a Pipe Support because the designer is
able to stagger hanger locations based on the PEX-a Pipe Support lengths.
Figure 6-15: PEX-a Pipe Support with ttings
BB
ABB