When the grooved pipe fitting is connected to the clamp, a layer of lubricating oil is applied to the inside of the clamp, one part is to catch the rubber sealing ring, and the other is to clamp the convex edge of the clamp to the inside of the groove, and then use the hand Tighten the bolts. When the bolts are too tight, you can use a rubber hammer to strike the convex line of the clamp. It is strictly forbidden to strike with heavy metal such as a hammer or a wrench to avoid damage to the surface of the pipe and reduce safety. When tightening the bolts, first tighten the bolt caps. When tightening the bolt caps, pay attention to whether the rubber seals are inside the clamps. The outer leakage of the seals will affect the sealing effect and affect the overall appearance.