Ok, so I saw a video the other day and a guy had a filter-like thing on his gauges. I cannot find it now to show a picture, but it was brass, about 3 inches long, hooked in between the manifold and the hose. On this in particular gauge, it was on the liquid/high side and was screwed in directly to the manifold.
I am trying to describe this to the best of my ability. Hopefully one of you guys can understand what I'm talking about and let me know what it is, what it does, and if I should be using one.
Thanks for your time in reading this and your reply.