User Guide

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Table E-2: PEX pipe expansion arm calculations ½" to 3"
¾" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta L
(in)
Flexible Arm
Length (in)
L1
(in)
L2
(in)
PEX with PEX-a Pipe Support and clevis hangers or loops
10
50 0.06 2.75 0.55 1.10
60 0.072 3.01 0.60 1.20
70 0.084 3.25 0.65 1.30
80 0.096 3.48 0.70 1.39
90 0.108 3.69 0.74 1.48
100 0.12 3.89 0.78 1.56
20
50 0.12 3.89 0.78 1.56
60 0.144 4.26 0.85 1.70
70 0.168 4.60 0.92 1.84
80 0.192 4.92 0.98 1.97
90 0.216 5.22 1.04 2.09
100 0.24 5.50 1.10 2.20
½" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta L
(in)
Flexible arm
length (in)
L1
(in)
L2
(in)
PEX with PEX-a Pipe Support and clevis hangers or loops has a thermal expansion rate of 0.12/10°F ΔT/100 ft. (3.05mm/5.56°C ΔT/30.48m).
130
50 0.78 8.38 1.68 3.35
60 0.936 9.18 1.84 3.67
70 1.092 9.91 1.98 3.97
80 1.248 10.60 2.12 4.24
90 1.404 11.24 2.25 4.50
100 1.56 11.85 2.37 4.74
140
50 0.84 8.69 1.74 3.48
60 1.008 9.52 1.90 3.81
70 1.176 10.29 2.06 4.12
80 1.344 11.00 2.20 4.40
90 1.512 11.67 2.33 4.67
100 1.68 12.30 2.46 4.92
150
50 0.9 9.00 1.80 3.60
60 1.08 9.86 1.97 3.94
70 1.26 10.65 2.13 4.26
80 1.44 11.38 2.28 4.55
90 1.62 12.07 2.41 4.83
100 1.8 12.73 2.55 5.09
160
50 0.96 9.30 1.86 3.72
60 1.152 10.18 2.04 4.07
70 1.344 11.00 2.20 4.40
80 1.536 11.76 2.35 4.70
90 1.728 12.47 2.49 4.99
100 1.92 13.15 2.63 5.26
¾" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta L
(in)
Flexible Arm
Length (in)
L1
(in)
L2
(in)
PEX with PEX-a Pipe Support and clevis hangers or loops has a thermal expansion rate of 0.12/10°F ΔT/100 ft. (3.05mm/5.56°C ΔT/30.48m).
30
50 0.18 4.76 0.95 1.90
60 0.216 5.22 1.04 2.09
70 0.252 5.63 1.13 2.25
80 0.288 6.02 1.20 2.41
90 0.324 6.39 1.28 2.56
100 0.36 6.73 1.35 2.69
40
50 0.24 5.50 1.10 2.20
60 0.288 6.02 1.20 2.41
70 0.336 6.51 1.30 2.60
80 0.384 6.96 1.39 2.78
90 0.432 7.38 1.48 2.95
100 0.48 7.78 1.56 3.11
50
50 0.3 6.15 1.23 2.46
60 0.36 6.73 1.35 2.69
70 0.42 7.27 1.45 2.91
80 0.48 7.78 1.56 3.11
90 0.54 8.25 1.65 3.30
100 0.6 8.69 1.74 3.48
60
50 0.36 6.73 1.35 2.69
60 0.432 7.38 1.48 2.95
70 0.504 7.97 1.59 3.19
80 0.576 8.52 1.70 3.41
90 0.648 9.04 1.81 3.61
100 0.72 9.52 1.90 3.81
70
50 0.42 7.27 1.45 2.91
60 0.504 7.97 1.59 3.19
70 0.588 8.61 1.72 3.44
80 0.672 9.20 1.84 3.68
90 0.756 9.76 1.95 3.90
100 0.84 10.29 2.06 4.12
80
50 0.48 7.78 1.56 3.11
60 0.576 8.52 1.70 3.41
70 0.672 9.20 1.84 3.68
80 0.768 9.84 1.97 3.93
90 0.864 10.43 2.09 4.17
100 0.96 11.00 2.20 4.40
90
50 0.54 8.25 1.65 3.30
60 0.648 9.04 1.81 3.61
70 0.756 9.76 1.95 3.90
80 0.864 10.43 2.09 4.17
90 0.972 11.07 2.21 4.43
100 1.08 11.67 2.33 4.67