Hi, I'm putting together a 1/2" system, 3mm thick wall. But there are many confusing sizes for barb and clips... Like... BSPT, bore, thread, hose clips... I'm not sure which one do I need. I would assume I need: Connector: 1/2 BSPT hose, 1/2 bore (which has 5/8 thread diameter?) Hose clips: 17-20mm clips? Is there a universal guide for this? Many thanks.
The BSPT is essentially the thread part. It is possible to get barbs for various tube dimensions, while still using the same thread dimensions. As far as I know, most waterblocks use 3/8" BSPT threads. You can get these barbs for 3/8" and 1/2" ID tubing. As for hose clips, I think if you use something like jubilee clips/worm drives, it shouldn't matter. Hope this helps 8-ball
THank you 8-Ball As usual you are very helpful. Wouldn't a 3/8" thread on a 1/2" tubing system somehow restrict flow?
With the old gas threads, BSPP BSPT, the thread size (3/8" or whatever) refers to the internal diameter of the pipe that will be inserted into it. ie, using 3/8" internal diameter pipe, the compression fitting used to secure two pieces together uses a 3/8" thread. Check this link for some charts of thread size, bore size, etc. It states that a 3/8" thread has an exterior diameter of ~16mm, which is nearer 5/8", leaving plenty of room for your water to flow.
