I am a big ole noob at this game, but love it to bits. Gas and fluid priorities killed one of my bases, so I made myself a cheat sheet, when i get confused I can check it. Thought I'd share in case anyone else doesn't get it. Example, my bathroom loop i use 'D' leaving the lavatory with '4' going into the water sieve and '5' going to my pincha farm. Or i would use 'A' out of my SPOM with '1' and '2' going to vents either side of my base.