The most important thing is to distinguish the advantages and disadvantages of copper pipe fittings. We can first observe the surface of the outside of the copper fittings, you can use some relatively sharp things to scrape, if the quality of the copper fittings is better, there will be a deep line, because the good copper fittings are produced with more than pure copper, copper extensibility is very good. So this better material is not scored is used in the military industry production or some more special industry. We can also scratch the surface of the copper pipe fittings inside, the material and just outside the scratch out of the material for comparison with each other, if the same, that is, the whole material is still relatively good. If the color is different or there is something else, that is the material of this copper pipe fittings is relatively poor, may be added inside other things like iron. In addition, we can force to fold the copper fittings, if it is easy to bend off is better, if the folding is very difficult, or after bending there will be cracks, especially in the copper fittings, then the quality of this kind of copper fittings is relatively poor.
