79 All I know is, last time I used BC kinesis pipes in a testworld (which was well after the RF update), I was using them to power some lasers, so I had a bunch of very small loops (because each laser had to be connected to a pipe and the lasers were all adjacent to each other), and when I turned the engines on, the pipe loops attached to the lasers all filled up really quick, and then drained again once I turned the lasers off.