need help extracting mixed light fuel from the side of an iron tank

[andwhat11]

i am using ftb revelations modpack 1.12.2, i have my refining setup for buildcraft in the pictures provided, works well and im able to run my quarry 24/7 off of gaseous fuel (cool) and still have a net gain of gaseous fuel until my iron tank holding mixed light fuel (hot) is full and i need to void it off to continue producing fuel. my original thought was to attach a void pipe to a side valve and any fluids above that valve would get voided but no matter what i try i cant seem to pull mixed light fuel out of the iron tank from a side valve, im able to pull it form top and bottom valves though. i have tried ender io pressurized pipes, i have tried buildcraft pipes with wooden extract pipes with and without redstone engines, i have tried immersive engineering pumps and pipes, i have tried attaching an ender tank directly to the valve; all of these fail, using a lever on the valve doesnt seem to do anything different. my end goal is to be able to void all fluids above the valve as i still need some fluid to remain in the tank as i need it for making light fuel which is fueling the combustion engines in the refinery setup. if yall have any thoughts please let me know thanks.