How to properly plumb a tank?

[e46er]

honestly i just glue them no unions at bulkheads

bulkheads are cheap unions expensive and unless your moving the tank on a regular basis ill spend the $20 bux later for new bulkheads and a couple couplings

you dont need shut offs on your drain lines
i dont have them on return lines either just 1 at the inlet and outlet of the pump for maintaince
i have 3 reactors running off my return pump(SOOOOO much easier) and those 3 lines have shut offs