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m3_arun · 01-08-2003, 11:24 PM

wel there can be different barbs sizes with different NPT sizes.
for example:

1/2" x 1/4 NPT
1/2" x 3/8 NPT
1/2" x 1/2 NPT

the ID of the THREADED section of the barb varies with the NPT size (according to BrianW's sources).
but since the water has to flow through that section anyways, a small NPT size means more flow restriction.

01-08-2003, 11:24 PM	#19
m3_arun Cooling Neophyte Join Date: Oct 2002 Location: san jose, ca Posts: 91	wel there can be different barbs sizes with different NPT sizes. for example: 1/2" x 1/4 NPT 1/2" x 3/8 NPT 1/2" x 1/2 NPT the ID of the THREADED section of the barb varies with the NPT size (according to BrianW's sources). but since the water has to flow through that section anyways, a small NPT size means more flow restriction. __________________ AthlonXP 1800+ @ 135x11.5 Epox 8k5a2+ Antec SX830 case 256MB Micron PC2400 WC system soon... Iwaki MD-30RZ (getting fittings right now) Cathar WW block #102 (arrived) Heater core (still pondering) (still need to get tubing)