User Guide

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Table E-2: PEX pipe expansion arm calculations ½" to 3"
2" 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 15.45 3.09 6.18
60 0.936 16.92 3.38 6.77
70 1.092 18.28 3.66 7.31
80 1.248 19.54 3.91 7.82
90 1.404 20.73 4.15 8.29
100 1.56 21.85 4.37 8.74
140
50 0.84 16.03 3.21 6.41
60 1.008 17.56 3.51 7.03
70 1.176 18.97 3.79 7.59
80 1.344 20.28 4.06 8.11
90 1.512 21.51 4.30 8.60
100 1.68 22.67 4.53 9.07
150
50 0.9 16.60 3.32 6.64
60 1.08 18.18 3.64 7.27
70 1.26 19.64 3.93 7.85
80 1.44 20.99 4.20 8.40
90 1.62 22.26 4.45 8.91
100 1.8 23.47 4.69 9.39
160
50 0.96 17.14 3.43 6.86
60 1.152 18.78 3.76 7.51
70 1.344 20.28 4.06 8.11
80 1.536 21.68 4.34 8.67
90 1.728 22.99 4.60 9.20
100 1.92 24.24 4.85 9.70
2½" 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 4.76 0.95 1.90
60 0.072 5.22 1.04 2.09
70 0.084 5.63 1.13 2.25
80 0.096 6.02 1.20 2.41
90 0.108 6.39 1.28 2.56
100 0.12 6.73 1.35 2.69
20
50 0.12 6.73 1.35 2.69
60 0.144 7.38 1.48 2.95
70 0.168 7.97 1.59 3.19
80 0.192 8.52 1.70 3.41
90 0.216 9.04 1.81 3.61
100 0.24 9.52 1.90 3.81
2½" 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 8.25 1.65 3.30
60 0.216 9.04 1.81 3.61
70 0.252 9.76 1.95 3.90
80 0.288 10.43 2.09 4.17
90 0.324 11.07 2.21 4.43
100 0.36 11.67 2.33 4.67
40
50 0.24 9.52 1.90 3.81
60 0.288 10.43 2.09 4.17
70 0.336 11.27 2.25 4.51
80 0.384 12.05 2.41 4.82
90 0.432 12.78 2.56 5.11
100 0.48 13.47 2.69 5.39
50
50 0.3 10.65 2.13 4.26
60 0.36 11.67 2.33 4.67
70 0.42 12.60 2.52 5.04
80 0.48 13.47 2.69 5.39
90 0.54 14.29 2.86 5.71
100 0.6 15.06 3.01 6.02
60
50 0.36 11.67 2.33 4.67
60 0.432 12.78 2.56 5.11
70 0.504 13.80 2.76 5.52
80 0.576 14.76 2.95 5.90
90 0.648 15.65 3.13 6.26
100 0.72 16.50 3.30 6.60
70
50 0.42 12.60 2.52 5.04
60 0.504 13.80 2.76 5.52
70 0.588 14.91 2.98 5.96
80 0.672 15.94 3.19 6.38
90 0.756 16.90 3.38 6.76
100 0.84 17.82 3.56 7.13
80
50 0.48 13.47 2.69 5.39
60 0.576 14.76 2.95 5.90
70 0.672 15.94 3.19 6.38
80 0.768 17.04 3.41 6.82
90 0.864 18.07 3.61 7.23
100 0.96 19.05 3.81 7.62
90
50 0.54 14.29 2.86 5.71
60 0.648 15.65 3.13 6.26
70 0.756 16.90 3.38 6.76
80 0.864 18.07 3.61 7.23
90 0.972 19.17 3.83 7.67
100 1.08 20.20 4.04 8.08
Table E-2: PEX pipe expansion arm calculations ½" to 3"