come in several different styles--screw threads, quarter-turn twist, and quarter turn and pull.
Then, close the drain cock
. Handle the drained fuel as hazardous waste and recycle it as prescribed by your SOP.
Open the separator, located behind the engine access door (curbside), by turning its drain cock
If that happens, fuel pours out of the drain cock
all over you and the ground.
* If the fuel is free of contaminants and water, close the drain cock
. Your system is not contaminated.