[SantaFe66]

What you can't see in the pic is that there is a machined shoulder on the inside of the fitting so it only goes onto the bulb all the way in one direction. If you turn it around, it doesn't go all the way onto the bulb. It would really leak if I turned it around.

I emailed the british firm that sells Smith's gauges. We'll see what they say about the picture.

Thanks, guys.

I'm also going to Home Despot tomorrow and see what they have.

Paul