There's lots of plumbing for a rdwc setup with either airstones for veg and wAterfall for bloom that's just how it is...Plus the plumbing I have is nice in clean and not a complete cluster fuck like most ppl have...I'm too ocd to do shit like that I also don't use any hoses either for like my return and theres a drain kit as well which leaves me with less than a gal in the entire system to shop vac out which is better than the 20gal I used to have to do with the B's return pump to drain as it stops when it's 1/4 below the PVC manifolds so I think not and that's where the drains come into play and works wonderful esp for me since I am disabled which is the main reason I made the system I did for ease of use and not having to lift anything really...And I did make it k.i.s.s vs most rdwc setups check em out u will be shocked to see all the lines running everywhere in every direction etc and a complete cluster fuck lol
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Ive always just done return drain line with flexible hose,can move them around then.3/8 feeders and air stones.Kinda waterfallish. Scrog them when there small and flip about 2 weeks from rooted clone.Its the light intensity that makes it.
I like your sprayer idea with perforated pipe along the edges.