brass

just about finished with plumbing, last bit of copper pipe due in tomorrow. then pressure test (air), finish cabling, fill, check for leaks, install winblows, optimize, then maybe send it to the smithsonian: |

So I'm thinking about eventually putting together a loop using brass tubing and compression fittings (with ferrules), but being in the US, it's not exactly easy for someone not in the know to find 1/4" BSPP compression fittings that don't cost $8+ a piece. What are your recommendations for...