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Question:

Copper Pipes? K L M. Is One Easier Than The Other To Put Into A Coupling ?

I have been using type M and it seems kinda hard to put it into a straight coupling. By using the L or K type. would it go in easier? I am obviously putting flux on first, but it just doesnt seem rite. Its a little tough to get it in there. I looked for the straight couplers that are a little wider that makes it easier to make the pipe go in, but only found them on the 90degree ones for the most part. I have seen T types with it, but not straight couplers. I think they call it flared but not sure. I am using 1/2 inch pipe. Any ideas or suggestions are greatly appreciated. Thanks for reading!

Answer:

What about DVD's or books? Or you could always just get the money and buy something yourself! That's what some of my aunts do for me.
Most likely like the other guy said, it's the way your cutting the tubing that is causing the problem. Rushing a tubing cutter can also slightly alter the tubing.
I would recommend a new wheel for your tubing cutter, m is the thinest wall pipe (besides dwv) and its probably just getting a little deformed at the cut building codes by me require L for fresh water. M is only used for boilers/radiators and K is used underground, flare fittings are not used for water
The OD of copper tubing is the same regardless of the type. That designates the thickness of the tubing walls. Be sure you wire brush or sand the inside of the fittings and the end of the pipe. Use a tube cutter rather than a hack saw to cut the tubing. Tube cutters crimp the end of the cut so it goes into the fittings easier. A saw leaves rough edges and shards.

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