User Guide

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Table E-2: PEX Pipe expansion arm calculations ½" to 3"
1¼" 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).
10
50 0.06 3.45 0.69 1.38
60 0.072 3.78 0.76 1.51
70 0.084 4.08 0.82 1.63
80 0.096 4.36 0.87 1.74
90 0.108 4.62 0.92 1.85
100 0.12 4.87 0.97 1.95
20
50 0.12 4.87 0.97 1.95
60 0.144 5.34 1.07 2.14
70 0.168 5.77 1.15 2.31
80 0.192 6.17 1.23 2.47
90 0.216 6.54 1.31 2.62
100 0.24 6.89 1.38 2.76
30
50 0.18 5.97 1.19 2.39
60 0.216 6.54 1.31 2.62
70 0.252 7.06 1.41 2.83
80 0.288 7.55 1.51 3.02
90 0.324 8.01 1.60 3.20
100 0.36 8.44 1.69 3.38
40
50 0.24 6.89 1.38 2.76
60 0.288 7.55 1.51 3.02
70 0.336 8.16 1.63 3.26
80 0.384 8.72 1.74 3.49
90 0.432 9.25 1.85 3.70
100 0.48 9.75 1.95 3.90
1" 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).
80
50 0.48 8.82 1.76 3.53
60 0.576 9.66 1.93 3.86
70 0.672 10.43 2.09 4.17
80 0.768 11.15 2.23 4.46
90 0.864 11.83 2.37 4.73
100 0.96 12.47 2.49 4.99
90
50 0.06 3.12 0.62 1.25
60 0.072 3.42 0.68 1.37
70 0.084 3.69 0.74 1.48
80 0.096 3.94 0.79 1.58
90 0.108 4.18 0.84 1.67
100 0.12 4.41 0.88 1.76
100
50 0.12 4.41 0.88 1.76
60 0.144 4.83 0.97 1.93
70 0.168 5.22 1.04 2.09
80 0.192 5.58 1.12 2.23
90 0.216 5.92 1.18 2.37
100 0.24 6.24 1.25 2.49
110
50 0.66 10.34 2.07 4.14
60 0.792 11.33 2.27 4.53
70 0.924 12.23 2.45 4.89
80 1.056 13.08 2.62 5.23
90 1.188 13.87 2.77 5.55
100 1.32 14.62 2.92 5.85
120
50 0.72 10.80 2.16 4.32
60 0.864 11.83 2.37 4.73
70 1.008 12.78 2.56 5.11
80 1.152 13.66 2.73 5.46
90 1.296 14.49 2.90 5.80
100 1.44 15.27 3.05 6.11
130
50 0.78 11.24 2.25 4.50
60 0.936 12.31 2.46 4.93
70 1.092 13.30 2.66 5.32
80 1.248 14.22 2.84 5.69
90 1.404 15.08 3.02 6.03
100 1.56 15.90 3.18 6.36
140
50 0.84 11.67 2.33 4.67
60 1.008 12.78 2.56 5.11
70 1.176 13.80 2.76 5.52
80 1.344 14.76 2.95 5.90
90 1.512 15.65 3.13 6.26
100 1.68 16.50 3.30 6.60
1" 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
150
50 0.9 12.07 2.41 4.83
60 1.08 13.23 2.65 5.29
70 1.26 14.29 2.86 5.71
80 1.44 15.27 3.05 6.11
90 1.62 16.20 3.24 6.48
100 1.8 17.08 3.42 6.83
160
50 0.96 12.47 2.49 4.99
60 1.152 13.66 2.73 5.46
70 1.344 14.76 2.95 5.90
80 1.536 15.77 3.15 6.31
90 1.728 16.73 3.35 6.69
100 1.92 17.64 3.53 7.05