Originally Posted by HamMike
I finished my gravity filter from Just Jeff's website. I ran some water through it and had some black discharge at the very beginning. Is this normal for a katadyn pro hiker filter? I had to give it a short siphin pull to get it goin but it flows good, small air bubbles in line.
Yes...what you describe is "normal". The black is a bit of charcoal powder (non-toxic, btw).