pressurefitting

Pressure fitting is a method of joining sections of pipe by deforming a fitting around or onto the pipe ends to create a sealed joint, without the use of solvent welding or adhesive. It relies on mechanical interaction between the fitting, a compression element, and the pipe surface to form a leak-tight connection. The technique is common in residential plumbing, radiant heating, and some industrial systems.

The main types include compression fittings, crimp or cinch fittings, and press fittings. Compression fittings use a threaded nut and ferrule to squeeze the pipe against the fitting body. Crimp or cinch fittings place a metal or plastic ring around the pipe and deform it with a crimping tool. Press fittings involve a specialized tool that deforms the fitting itself to grip the pipe and form a joint. Push-to-connect or clamp-style fittings provide a quick-connect option with internal teeth that grip the pipe.

Materials and compatibility vary by system. Commonly used pipe materials include copper, PEX, CPVC, and PVC, with fittings designed to suit each combination. Tools and standards differ by type, and some joints are not easily disassembled. Proper preparation—clean, deburred pipe ends and correct insertion depth—is essential, as is testing for leaks after installation.

Advantages of pressure fittings include speed, ease of use in tight spaces, and avoidance of solvents or heat. Limitations include the need for specialized tools, material compatibility constraints, potential difficulty in rework, and, in some cases, a non-reusable joint. Suitable for both residential and commercial installations when installed according to manufacturer guidelines.