Fill Nipple Compatability

[AJermstad2]

Just wondering if all fill nipples were compatible with all regs or not?

eg. Does a WDP fill nipple for an Angel AIR reg only fit an AIR reg or could it be used on others?

Cheers

 

[Kitch]

Only fit Angel Airs fella can't remember the thread type of the nipple, but all other nipples use 1/8" BSP.

 

[AJermstad2]

Thanks for confirming what I thought. Just wanted to double check before I get rid of all my angel spares.

 

[Tom Allen]

The angel fill nipples are 1/8 bspp

Most others are 1/8 bspt, or 1/8 npt

The difference is, bspp is a parallel thread, bspt is a tapered thread.