Pipe nipples are the parts that connect water pipes. Generally, water pipe joints can be divided into external threaded water pipe joints, card sleeve water pipe joints, and self-fixing water pipe joints. If the joint is leaking, you can try to solve it by the following methods: Step 1. Remove the original joint first. If it is difficult to disassemble due to rust, a hacksaw can be used. Without touching the thread of the water pipe, make an incision, and then use a pipe wrench to unscrew it. Step 2. Check whether the rubber pad is aging. If so, you need to replace it with a new one. Apply a thick layer of white paint on the silk opening, wrap it with hemp silk (or raw material tape), and then install it. Step 3. If there is water leakage at the junction or welding, it is best to replace it with a new one!