Often, when using an apartment at home, we have to face the sealing of a threaded connection in a water or central heating system. we have several types of inch pipe thread. Therefore, it is good to recognize the thread at the very beginning. As we know what thread of the pipe we have. A sealing method must be selected. we can seal with tow and paste. With Teflon tape, thread sealant or gasket. I showed how to seal the thread in the video.