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Table D. Type M Pressure losses due to friction in Type M copper tube
Pressure per 100 foot of tube (psi)

Flow,
gpm
Nominal or standard size, inches
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
5
6
1
2.5
0.8
0.2









2
825
2.8
0.5
0.2








3
17.3
5.7
1.0
0.3
0.1







4
28.6
9.4
1.8
0.5
0.2







5
42.2
13.8
2.6
0.7
0.3
0.1






10

46.6
8.6
2.5
0.9
0.4
0.1





15


17.6
5.0
1.9
0.9
0.2





20


29.2
8.4
3.2
1.4
0.4
0.1




25



12.3
4.7
2.1
0.6
0.2




30



17.0
6.5
2.9
0.8
0.3
0.1



35




8.5
3.8
1.0
0.4
0.2



40




11
4.9
1.3
0.5
0.2



45




13.6
6.1
1.6
0.6
0.2



50





7.3
2.0
0.7
0.3



60





10.2
2.7
1.0
0.4



70





13.5
3.6
1.2
0.5
0.1


80






4.6
1.6
0.7
0.2


90






5.7
2.0
0.9
0.2


100






7.5
2.7
1.0
0.3
0.1

200







8.5
3.6
1.0
0.3
0.14
300








8.0
2.0
0.7
0.3
400









3.3
1.2
0.5
500










1.7
0.7
750










3.6
1.5
1000











2.5

Note: Numbers in bold face correspond to flow velocities of just over 10 feet per second.

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