User Guide

Plumbing Design Assistance Manual | Appendix C – Fitting equivalent length l 107
Fitting adapters
Nominal size (in) Flow path
Avg. C
v
Eq. length (ft)
½ PEX x ½ copper Through 7.7 1.0
½ PEX x ¾ copper Cu to PEX 5.6 2.2
¾ PEX x ½ copper PEX to Cu 8.8 1.5
¾ PEX x ¾ copper Through 15.7 1.5
¾ PEX x 1 copper Cu to PEX 11.4 3.1
1 PEX x 1 copper Through 30.5 1.3
1¼ PEX x 1¼ copper Through 34.0 3.8
1½ PEX x 1½ copper Through 63.7 1.8
2 PEX x 2 copper Through 150.7 0.8
Sweat adapters
Nominal size (in) Flow path
Avg. C
v
Eq. length (ft)
½ PEX x ½ copper Through 5.7 2.0
½ PEX x ¾ copper Through 5.1 2.7
¾ PEX x ½ copper Through 8.8 1.4
¾ PEX x ¾ copper Through 13.4 2.1
¾ PEX x 1 copper Through 10.9 3.7
1 PEX x 1 copper Through 22.1 2.4
1¼ PEX x 1¼ copper Through 34.0 3.9
1½ PEX x 1½ copper Through 45.5 4.3
2 PEX x 2 copper Through 83.6 5.3
2½ PEX x 2½ copper Through 136.2 6.9
3 PEX x 3 copper Through 189.1 8.8
Male adapters
Nominal size (in) Flow path
Avg. C
v
Eq. length (ft)
½ PEX x ½ MNPT Through 5.0 2.3
½ PEX x ¾ MNPT NPT to PEX 6.2 1.8
¾ PEX x ¾ MNPT Through 11.3 2.7
¾ PEX x 1 MNPT NPT to PEX 10.9 3.4
1 PEX x ¾ MNPT PEX to NPT 17.8 1.2
1 PEX x 1 MNPT Through 19.9 3.2
1¼ PEX x 1¼ MNPT Through 32.4 4.2
1½ PEX x 1½ MNPT Through 39.3 5.5
2 PEX x 2 MNPT Through 78.6 5.6
2½ PEX x 2½ MNPT Through 227.3 1.5
3 PEX x 3 MNPT Through 187.5 9.1