I have to say I design a little different then others. I would have never come up with this design by myself. I have my runs in a straight line.On the end of each of my lines every 2-3 cycles I will run a cylinder honer thru each run and drain lines.
Day one of harvest after the feed sys has shut down I add enzymes to tanks,rez.Day 3 drain and fill with a greenhouse sterilizer. day 4 the guys scrub down everything, day 5 spray H peroxide with foamer, flush and let up rez with rooting nutes and bennies. Run overnight. Next day move in next cycle. One reason I like to make two sets of tanks. You can remove a plant/tank and plug another one in in about 30 min. No stress to the plant. I can mold in some nice casters into the tank to roll around so my back does not hurt that much.
Day three and after I run after 3 cycles on a norm. Otherwise I run the enzymes next day spray down the tanks with the peroxide wait 2 hours rinse, it takes about 2 hours more to prepare bennies nutes ect . Add plants while sys running so I can make sure drip and aero are where they need to be and flowing correctly.
Tip on plumbing pvc #232. Make sure your fitting have seated all the way. That little gap creates a spot have to attack and easy to defend.