The spray bars I used was 20mm waste pipe the white long stuff. Cheap cheerful and easy to trim.
After this next one I'm hoping to rebuild mine with all new pipes.
I sealed mine but if you cut holes big enough for the tank connectors to slide in and out you only need the rubber washer to seal them. I think I use 40mm returns I'll link my thread of my build there's no pics of ut there's everything I bought.
https://www.thctalk.com/cannabis-foru...d.php?t=149871
Jesse obviously had a much more refined build than me however I went with what worked for me.
When I do the loft into a giant tent I'll do similar to Jesse.
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