Water separator thread size

[imp0ster]

I'm swapping my mechanical to a high flow and reliable electric and everything is hard line. I need to convert to 3/8 soft line so I need the NPT to barb size. Does anyone know the thread size for the water separator, OEM fuel pump and carb? Thanks in advance

 

[Bt Doctur]

Does anyone know the thread size for the water separator, OEM fuel pump and carb?

water/fuel sep uses 1/4 inch pipe thread 1/4 x 18 NPT
fuel pump threads 1/4 x /18 NPT
carbs may be 3/8 Inverted flare thread
fuel pumps go on the suction side of a tank, fuel seps are not pressurized

 

[Bondo]

I need to convert to 3/8 soft line so I need the NPT to barb size.

Ayuh,..... 1/4" pipe to 3/8" barb,....

 

[imp0ster]

thanks guys!