I needed to splice a union to legthen one of my boost gauge lines...and darn it...I swear they were 1/8" poly. The unions I look at don't have the nipple...just a ferrell. in 5/32" poly...the unions have the nipple.

It seems like my tube to pipe thread adapter at the intake manifold had the nipple?

What gives...so I bought both. But is it still the 1/8"? I guess I will find out.

My would the union not have the nipple? 100% sure it is for poly air lines...

Came from Trebar Kenworth down the road.