Need to Drill & Tap to get a barb to fit - Help Needed

AFK_Matrix · 22 Jun 2006 at 12:08

Hopefully this is a nice quick question.

I am going to be getting the Acrylic Aquatube when they come into stock. Now these have 1/8" threads and unfortunetly there are no 1/2" barbs that will fit. So going to have to drill out 2 holes so I can fit 1/2" barbs.

Now all I need to to is rethread the Aquatube to use 1/4" BSP thread. So what I want to know is what hole size to drill? Am I right in thinking I will have to drill a 11mm hole?

Thanks

feriso · 22 Jun 2006 at 12:17

AFK_Matrix said:
Hopefully this is a nice quick question.

I am going to be getting the Acrylic Aquatube when they come into stock. Now these have 1/8" threads and unfortunetly there are no 1/2" barbs that will fit. So going to have to drill out 2 holes so I can fit 1/2" barbs.

Now all I need to to is rethread the Aquatube to use 1/4" BSP thread. So what I want to know is what hole size to drill? Am I right in thinking I will have to drill a 11mm hole?

Thanks

No no no no no!!!

Don;t drill and tap - just get reducers to fit (use them the other way round)

You'll need a 1/8 nipple, 1/8 to 1/2 male 2 female reducer, add some PTFE tape and you are sorted.

This way you leave your kit alone.

AFK_Matrix · 22 Jun 2006 at 12:19

True but won't that mean I have a restriction in my loop? As its going from 1/2" down to 1/8"?

DaveMac · 22 Jun 2006 at 12:55

29/64" or 11.54mm drill required for a G1/4 or 1/4"BSPP tap.

AFK_Matrix · 22 Jun 2006 at 13:47

Thanks Dave just what I was after.