I currently am new to a CCUC system and have a 6 bucket 8 gal system . I'm looking at duplicating it for another tent. I have everything but decided to try to find the bulkhead they use instead of uniseals. Have you found any of those?
"My full build log for the 8 site UC system for under $300" is here (much more detail and a parts list etc.):
https://www.thcfarmer.com/community...formance-under-current-for-300-or-less.94487/
I believe the fittings CC uses are proprietary design and not available. They don't even sell them as replacements. They do this to prevent you from doing a DIY system I am pretty sure :( .
I have an update though: If you use the aquarium bulkheads use 2 seals. This is because to use these as a hydro bulkhead you have to put them together reverse of their intended design. If you don't you cant disassemble the system for cleaning, maintenance or moving the system. In aquarium culture the portion of the BH fitting that has the outside threads goes on the dry side and the flange side and seal on the wet side. In hydro it is reversed so you need a second seal on the wet side I made some seals out of silicone gasket sheet by simply cutting them out with scissors after tracing the correct inside and outside diameter on the sheet of material using a sharpie. costs about $12 for the gasket material at Ace hardware. Also, I used pure silicone high vacuum grease to help the seals seat better and prevent the seal on the wet (nut) side from wadding up when torque is applied to the nut. Works great and is food grade silicone so it wont hurt your plants etc.
Sources:
Gasket material: Ace hardware or McMaster-Carr (online) for sheets of silicone or precut gaskets
High vac grease: Amazon
BH fittings: Amazon, Buy the "CPR" Aquariums brand only, other brands suck and tend to leak when used in hydro applications. 4 packs cost about $25.
PS, I also have an 8 bucket prototype that uses ABS conduit bulkheads and although I thought those would be more prone to leaks the prototype is still running leak free growing food crops for my family in another grow room. It also requires 2 gaskets (inside and out) and I use common toilet gaskets which a cheap along with the high vac grease as well. It is somewhat cheaper to set up than the aquarium fittings but in the end I prefer the aquarium ones.
Sources:
ABS conduit BH fittings: Home despot or Lowes
Seals: Home Despot or Lowes
Hope this helps.