I have a 400 on front and two saddles on each side.
The front is lower than the sides, so I put a 12 volt valve in the front and shut it off when it get full which lets the saddles fill up.
then when planting or striping, I can drain the saddles and then hit the switch and the front starts to drain.
Saddle Tanks and Planter Tanks-Plumbing questions
