pack version: 0.5.1 note: Terraforged updated manually before 0.5.2 was released

Server crash when connecting pretty pipe fluid extractor to pretty fluid pipe which is connected to a Tinkers Drain

crash-report: https://gist.github.com/natebc/da040af764aff6aab2329d7f9458a66d

Obviously this is an upstream problem somewhere so I should probably also take this to tinkers and pretty pipes as well.

Reported to PP Fluids repo: Quarris/PrettyFluidPipes/issues/4