4 Way Gas Manifold Issue

[Qs]

I've got a 4 way gas manifold that I'm installing and I just checked each port but one of them doesn't seem to be working. All the others are letting the air through as expected but the 3rd along for some reason isn't. Anyone have any experience of this? Know any potential fixes?

I got the manifold from HBC so I'm guessing a few others have the same one, it looks like this

[Qs]

Never mind it just needed a tighten.