Transposer

The Transposer ingests single items into Pneumatic Tubes, and can also serve as a valve. It is similar to the Filter and Retriever.

Capabilities

Ingesting items thrown or dropped into it, or pushed into it by a stream of water, without needing a redstone signal.
Sucking all items in front of itself in a two-block distance upon receiving a redstone pulse. A vertically-oriented transposer embedded flush in a floor will ingest items sitting on all the eight neighboring blocks on the floor.
Sucking one item from a container (chest, for example) upon receiving a redstone pulse.
Sucking everything that arrives via tube when connected to tubes in-line, thus being a valid receiver.
Shutting off when receiving a continuous redstone signal, acting as a closed valve if connected in-line.
Can recieve maximum of 5 redstone signals per second (1 signal per 4 ticks).

What happens when a Transposer's output tube is not connected to a valid receiver? If the Transposer is connected in-line it will backstuff everything arriving in the input tube, otherwise it will drop items back on the ground.

If a colour tagged item enters a Transposer via a Pneumatic Tube, it will come out without a colour tag.