tap size for tapping pump?

[teton]

does anyone know what size tap i should use for my pump, im doing duel cooling and am using the same 3/8 right angle fittings as used on an ada head, b-pipe etc.....

I tried searching but i couldnt find anything

thanks.

 

[DangerBoy]

usually 1/4 NPT

 

[crammit442]

1/8 NPT for 3/8" fittings.

 

[WDKfan]

1/8 NPT for 3/8" fittings.

X2