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Thanks Jaybo, I couldn't find metal end caps premade so I went with plastic ones. Hopefully the marine epoxy will hold up.

Here are some pictures so far.

Hey majins, that's exactly what I was thinking at first. I have a total of 24 cobs I want to hang and didn't want to spend almost $250 for cooling blocks though. I made it to the metal shop yesterday and picked up my 5 foot lengths of tube. I plugged the ends with a hard plastic end cap and...

Side note I think either sand or MAPP or maybe more patience would work for me, in open air with an ambient temp of 70F I got the aluminum up to 400C which if I read the internets right means I was 200C short of the temp I needed after ~20 minutes of heat in one spot.

Interesting build Jay, if I understand this correctly you're mounting your cob on the flat end on the left and the tubing is both your outlet and inlet? I feel like I might be missing something there. The plan I have would look something like this shitty picture. In case you can't read my...

Thanks Shugglet, I couldn't find anyone with a journal of a finished project that used hollow bar instead of the Chinese milled cooling blocks. If I understand this correctly as long as my loop temp is above ambient I shouldn't have to worry about condensation right? Even if I manage a Tc of 25c...

Thanks for the heads up Jaybo, I went and got some brass brazing rods to try to join some 90 degree angle aluminum I had into a tube to test the concept but couldn't get enough heat with my propane torch. I assume low temp brazing rods have a different composition than the brass I got? Welding...

Okay, so I've done some research on the efficiency of water cooling vs forced air cooling and it seems to me that water cooling is the way to go. I understand active air cooling is usually effective but my decision to go water is based on two things, I already have a few high gph pumps and other...