Waterproof COUPING E.M.T for this connector is used with E.M.T. steel pipes, which are thinner and cheaper than E.M.C. The installation method is much easier. If it’s an E.M.T. Just insert the end of the pipe into the connector position. and the screws are tightened, the installation is complete. But if it is an E.M.C. which is thicker than E.M.T. Many have to tap the thread and turn the thread to connect. Therefore, it can be seen that the E.M.C. must know the exact distance to cut the pipe and the tapping distance There must also be a tapping machine as well. E.M.C. pipe price is more expensive Connectivity devices are also more expensive. Advantages of the E.M.C. pipe system It is more beautiful and refined. better protection against water