At PEX fittings compression PEX tubing held a special split ferrule, which is compressed when unscrewed, the external threaded portion of PEX fitting long nut. Tighten nut ferrule tightly clasps metal pipe, pressing her inner surface to the surface of the PEX fitting socket. Seal joints provided sealing rings located at both the socket PEX fitting, and inside the clamp nut. The connection of metal pipes with compression PEX fittings – loosely, permits repeated assembly – disassemble of joints.
Each of the PEX fittings described has its advantages and disadvantages. Press PEX fittings are securely connected to the metal-tube, because the connection pipe PEX fitting, achieved an almost one-piece molding. However, mounting press PEX fittings require special tools to crimp – press machines, manual or hydraulic. Work on installing the press PEX fitting requires some experience, bad crimp crimp sleeve can cause an accident PEX plumbing. Installation of compression PEX fittings is carried out by conventional wrenches, movable or carob, a connection can make the installer even with little experience with metal-PEX tubing. However, the connection obtained in this way is often leaky, which leads to leaks in the joints of compression PEX fittings and metal pipes.
Pipes, connections are done with the use of press PEX fittings, thanks to the reliability of the connection can be removed in the channels of the work being done in the walls, that is, possible to hide the installation of PEX plumbing. Connection made by compression PEX fittings require constant monitoring for leaks, so the main area of their application – water pipes, mounted an open way.
The main requirements for PEX fittings: To ensure a reliable connection between a pipe and PEX plumbing fixtures, long-term trouble-free operation, and ease of installation, ultimately decreasing the cost of works on arrangement of PEX plumbing.
