User Guide

Plumbing Design Assistance Manual l Chapter 4 – Pipe sizing l 39
Uponor AquaPEX
design parameters
Domestic cold-water piping
• Maximum velocity of
12 ft./sec. through pipe
• Recommended velocity of
10 ft./sec. through pipe
Domestic hot-water piping
• Maximum velocity of
12 ft./sec. through pipe
• Recommended velocity of
8 ft./sec. through pipe
• Maximum operating
temperature of 200°F
(93.3°C)
Domestic hot-water
return piping
• Maximum velocity of
2 ft./sec. through pipe
• Maximum operating
temperature of 140°F (60°C)
• Sized per the requirements
stated in ASPE Plumbing
Engineering Design
Handbook, Volume 2,
Plumbing Systems
Note: Uponor allows the dedicated xture supply pipe to be of the same nominal size as the xture being supplied, provided the
dedicated pipe is no longer than 25 linear feet from a uniform-friction-loss-sized pipe.
Note: Uponor allows the use of ½" pipe for domestic hot-water return piping provided a ow-control device is in place to maintain
velocities at or below 2 ft./sec. Refer to Table 5-8 on page 55 for appropriate ow rates at 2 ft./sec.
To determine the maximum velocities based on the use, geographical region and intended operating conditions for your specic
project, contact Uponor Design Services at: U.S.: 888.594.7726 or [e-mail]
Canada: 888.994.7726 or [e-mail]
Flow
75 FU 60 FU
40 FU 32 FU
45 FU 30 FU
24 FU 16 FU
15 FU
15 FU
8 FU
15 FU
8 FU
8 FU
15 FU
8 FU
15 FU
8 FU
2" CW
1½" HW
1½" CW
1¼" HW
1½" CW
1¼" HW
1¼" CW
1" HW
1" CW
¾" HW
Figure 4-5: Apply water size chart to plumbing design
Figure 4-4: Water size chart