Table 14.7. Pressure Loss in Fittings and Valves Expressed as Equivalent Length of Tube, feet

Nominal or standard size, inchesFittingsValves
Standard ell90° teeCouplingBallGateBtflyCheck
90°45°Side
branch
Straight
run
38 .5 - 1.5 - - - - - 1.5
12 1 .5 2 - - - - - 2
58 1.5 .5 2 - - - - - 2.5
34 2 .5 3 - - - - - 3
1 2.5 1 4.5 - - .5 - - 4.5
114 3 1 5.5 .5 .5 .5 - - 5.5
112 4 1.5 7 .5 .5 .5 - - 6.5
2 5.5 2 9 .5 .5 .5 .5 7.5 9
212 7 2.5 12 .5 .5 - 1 10 11.5
3 9 3.5 15 1 1 - 1.5 15.5 14.5
312 9 3.5 14 1 1 - 2 - 12.5
4 12.5 5 21 1 1 - 2 16 18.5
5 16 6 27 1.5 1.5 - 3 11.5 23.5
6 19 7 34 2 2 - 3.5 13.5 26.5
8 29 11 50 3 3 - 5 12.5 39

NOTES:
Allowances are for streamlined soldered fittings and recessed threaded fittings.
For threaded fittings, double the allowances shown in the table.
The equivalent lengths presented above are based upon a C factor of 150 in the Hazen-Williams friction loss formula. The lengths shown are rounded to the nearest half foot.