User Guide
Plumbing Design Assistance Manual l Chapter 6 – Installation methods l 67
ProPEX ball valve
B
A
Nominal
pipe size
Spacing for bare PEX (Dimension A) Dimension B
International codes
(IPC, IMC)
Uniform codes
(UPC, UMC)
National Plumbing Code
of Canada (NPCC)
All codes
½"
32" 32" 32" -
1
¾"
32" 32" 32" -
1
1"
32" 32" 32" -
1
1¼"
32" 48" 32" 18"
2
1½"
32" 48" 32" 18"
2
2"
32" 48" 32" 18"
2
2½"
32" 48" 32" 7"
3
3"
32" 48" 32" 7"
3
Table 6-4: Support requirements for valves
1
Place ½" to 1" ball valves anywhere within Dimension A.
2
Based on a ProPEX ball valve or similar
3
Based on ductile-iron buttery valves or similar
Figure 6-10: Supporting 1¼" to 2" ball valves
Figure 6-11: Supporting 2½" to 3" buttery valves
When distance “B” in the above example is not attainable,
additional support of the valve is required as shown in Figure 6-12.
Figure 6-12: Additional support for buttery valves
B
A
Butterfly valve
ProPEX flange adapter
ProPEX ring
B
A
Butterfly valve
ProPEX flange adapter
ProPEX ring