Tank outlet - hose - (i have an inline strainer) - 'y' piece - two pumps etc...
I use a hoze lock 'y piece' connected by 3 brass hose locks
Not had any leaks problem since I first put it together (theres no pressure at this part of the system as the pumps are drawing, so connections should last)
This is it set up in my old van, still the same connections in the new one with no issues