In Buildcraft the filter pipe works different. If you're putting the diamond (for example) in red direction, then in this direction will go ONLY diamonds. In your mod all the items can go in that direction, unless you configure ALL other items to go anywhere else. I don't understand, how can i configure the filter pipe, so all the different items, except diamonds (for example), go elsewhere. Should i block the red diamond route for every item one by one?

@Maburillo the filter pipe works exactly the same as the buildcraft diamond pipe.

What i changed though is: Instead of limiting to 9 items per side is, to have a global limit of how many items can be inserted.
Iirc that is 127 filters.

Each filter can be configured to what side it is enabled/disabled for.
If a button is unpressed, it is enabled, while if it is pressed it is disabled.

And you can set filters for if a item is not defined.

This may seem confusing at first, but you will realize quickly that this is basically the same as the existing system but providing much much more control/filterablity then buildcrafts implementation

Anyways. I hope this answers your question

Thank you! I didn't realize at first that these buttons (on the screenshot) works for a non defined items.

@Maburillo it even states it in the tooltip :)