1. Heat welding: First, the pipe is inserted into the pipe fitting, and the polyethylene layer in the pipe fitting is softened by heating, and then the PEX and the polyethylene are fused and bonded together, so as to achieve the purpose of connection.
2. Electric welding basically relies on melting and bonding, that is, heating with a heating wire, which is preset in the pipe fitting. The above two kinds of pipe fittings are plastic pipe fittings.
3. Compact clamping connection. Use special tools to deform pipes with special structures to achieve the purpose of connection, such as copper pipe fittings and galvanized connecting pipe fittings.