Why so small (1/4") threads on watercooling

[Hellemyr]

Hi!

Why does all the watercooling components use so small threads and fitting?

Whats the point of having 1/2" tubes when the fittings are 1/4". Wasent it alot more common whit 3/8" threads before? Its alot of resistance in the small fittings, hard for the pumps.

[Xavior]

Because 1/4'' threading doesn't mean the diameter is only 1/4''. There was a chart somewhere that explained it, can't seem to find it anywhere though.

[DepTi]

Xavior is right, the thread size does not mean the diameter size. For most 1/2" OD barbs, the inner diameter is usually consistent for the length of the barb, including the thread part.

[serialk11r]

Yup, the diameter of the inside is not 1/4". And besides, half an inch of 1/4" is not going to cause any major restriction...
I believe 1/4" barbs are something like 3/8 to 7/16 on the inside, and 3/8" barbs are something like 5/8 to 3/4 on the inside.

[largon]

G1/4" is a measure of the amount of threads per inch (TPI). Can't say what the value actually depicts though.

The TPI figure also dictates the inner diameter of the bore in the threaded end. For example a G1/4" threaded connectors is 7/16" (11.125mm) ID @ maximum.

[KVL]

1/4" is the radius, so the diameter is 1/2".

[largon]

KVL,
Errr. No.

[beaneh]

Haha my waterblock must be messing with my mind if it is 1/2 in diameter on both inlet & outlet.

[Cyprio]

Hope this helps:

Measuring BSP threads.

This is also a case of measuring across the threads but the BSP quoted sizes are not the same as this measurement. An 1/8-BSP thread measures 0.39” across, a 1/4-BSP is 0.53” across, 3/8-BSP is 0.66”, 1/2-BSP is 0.83”, 5/8-BSP is 0.90” and 3/4-BSP is 1.04”.