compression joint การใช้

You can use compression joints, but they are a sucker's way out.
Modern awning design incorporates urethane compression joints, steel support structures, and wind sensors.
While less convenient than compression joints and less reliable than flux solder joints, they are useful when fitting in confined spaces and where single handed fitting is required.
P . S . These joints work by compressing them with the little plastic things on the end of the pipes when you screw them together, which is why I said it looked like a compression joint.