Nubius did you get those 5/8" barbs at a local hardware store? And I guess that I would be able to stretch 1/2" tubing over them. And do I have to put on the female ends first or could I just attach the barbs onto the heater core?
yeah got 5/8" barbs at home depot...female ends I got at some local no name hardware store...the NPT is 1/2" for both of them whereas if you look at your normal barbs, like the 1/2" barbs from dangerden the NPT is only 1/4"....the NPT is referring to the actual size of the part with the threads...so the female part is 1/2" wide, and the part that screws into it is 1/2" wide and the actual barb is 5/8" get what I'm sayin?
And yeah 1/2" tubing stretches over it....run the end of the tubing under some hot water and it'll make it easier to stretch it on.
I suppose you could just put the barbs on the heatercore if you wanted, but the female ends that I got in that picture fit over the heatercore pipes perfectly, so with JBweld on there it makes a nice snug fit and then of course I use some plumbers tape around the male end before tightening it end, along with some goop my friend gave me used in aquariums that kind of solidifies around the fittings.
I basically just followed the instructions there...the 'cold soldering' method of course