I found out that this is an "Additional pipes" issue and not a "BuildCraft" issue.
I'm using buildcraft "buildcraft-all-184.108.40.206" on my server and everytime I'm trying to pump something it works(ofcourse) but then if I go on playing the engine (doesn't matter which one) stops and the any liquid just keeps on flowing, for some great but for me and my friend (who are playing survival) it isn't so great.
This means oil puddles which aren't draining, water lakes/lava that aren't draining you know what I mean.
I have searched google with no answers, any answers here by any chance? Maybe it is because I'm using other mods too?