middletonmark,
you insert the threaded end of the barb adaptor into your output, the surface just to the left of the grinded part fits into the 1" elbow with a little resistance. So it stays in place.
Troy,
As soon as Teri gets out of the shower I'll have her take a pic at that angle for ya..... But don't hold your breath... if ya know what I mean.
Scooterman,
Actually it doesn't thread into anything, the flat spot to the left of of the reworked area slides right into the 1" elbow perfectly.... I don't know if this will work with other sizes, you'll have to experiment.