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Soldering copper question. Answered

I'm working on a project that requires soldering a 1/4" OD copper tube into a hole drilled in the side of a 2" copper pipe. Will a soldered join (not brazed) be sturdy or do I need to do something to reinforce (cut threads into the tube and pipe, flare the tube and insert from inside, etc) it? There won't be a lot of stress on the join but there will be a small tap on the tube to there may be a bit of torsion now and again.

Thanks for your responses!



6 years ago

Use either a saddle valve or saddle clamp, whichever fits you need. They come in a variety sizes and configurations.

How about drilling straight through the 2" pipe and feed the 1/4" tube through the pipe so it pops out a bit on the other side. Solder both joints. On the side that juts out, file down the joint to match the pipe. It should add considerable strength.

+1, but he'll have to drill a few holes in the part of the 1/4" tube that is inside the 2" pipe to allow whatever is supposed to come out of the tap to get to the tap.

Ah, depends on if tap means something like a beer tap or tap and die as in threaded pipe, then there are other things to consider to reinforce the joint such as a flange of some sort and the thickness of the pipe.

Thanks for the replies!

When I mentioned tap, I was talking about an inline needle valve.

Drilling two holes isn't really an option. I just want to make sure that I have a joint that's won't crack every time the tube gets bumped or the valve opened.

and then depending on what you have flowing through the pipe, usually any kind of valves are inline or off a short length of pipe called a nipple. Would you not put a T- fitting inline with the pipe and then reduce it out to your valve? Or there are some applications where you have a hose clamp type of contraption but that is not a good permanent fix.