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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!

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Burf

8 years ago

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

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caitlinsdad

8 years ago

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.

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Kitemancaitlinsdad

Reply 8 years ago

+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.

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caitlinsdadKiteman

Reply 8 years ago

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.

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Mr. E Meatcaitlinsdad

Reply 8 years ago

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.

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caitlinsdadMr. E Meat

Reply 8 years ago

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.