Conduit (Thaumcraft 1)

Liquid vis cannot be handled safely so to transfer it from the crucible to things that need it you need glass conduits. Nodes can be connected to conduits to act as storage containers, but they have a far more important purpose than that - Symbols draw their power from nodes to power their mystical effects. For mysterious and arcane reason Nodes cannot be placed directly adjacent to each other.

Valves are used to control the flow of vis - clicking on a valve (or supplying a redstone signal) blocks the flow of vis through it.

Portable Nodes work like normal nodes, except they are created containing a fixed amount of vis. They cannot connect to conduits are other blocks that draws vis from conduits. Portable nodes act as a way to quickly place a fuel source for symbols without having to setup a crucible or conduit network. When broken portable nodes turn back into normal (empty) nodes and their remaining vis is lost.