IFAN Custom PEX Sliding Fittings

Visual Inspection of Ring Seating

Upon completion of the sliding operation, the installer should perform a visual assessment to confirm that the compression ring has advanced fully into its final position - resting flush against the fitting's integral shoulder. The absence of any discernible gap between the leading edge of the ring and the shoulder face serves as the primary visual indicator of a properly executed connection.

Uniformity of Compression

A correctly installed fitting will exhibit symmetrical, evenly distributed compression around the full circumference of the ring. Any visible irregularities - such as localized bulging, asymmetric deformation, or areas where the ring appears to have tilted during advancement - should be treated as grounds for rejection and rework.

Pipe Insertion Depth Confirmation

Prior to sliding the ring, the pipe must be pushed completely into the fitting body until it contacts the internal stop. Most manufacturers provide a depth-reference mark on the pipe; this mark should disappear beneath the fitting's entry point once full insertion has been achieved, providing a quick visual confirmation that the pipe has reached its intended position.

Damage Assessment

Both the pipe surface and the ring itself warrant careful scrutiny. The pipe should be free of circumferential scratches, gouges, or scoring that could compromise the seal. Likewise, the ring must show no signs of cracking, splitting, or irregular deformation - defects that may indicate improper tooling or excessive force during installation.

Practical Scenarios

In a correctly executed installation, the ring sits squarely against the shoulder with a clean, uniform profile - a clear visual pass. Conversely, if a gap remains visible between the ring and the shoulder after the sliding operation, the connection has not been fully made and must be corrected before the system is pressurized.

Pressure Testing

While visual inspection provides a valuable first line of verification, hydrostatic or pneumatic pressure testing remains the definitive validation method. The assembled system should be pressurized to approximately 1.5 times its rated working pressure and held for a minimum of 15 to 30 minutes. A stable pressure reading - with no measurable drop - confirms the integrity of every joint in the tested section.

Go/No-Go Gauge Verification

Certain manufacturers offer purpose-built go/no-go gauges designed to objectively confirm proper ring positioning. By attempting to pass the gauge over the completed fitting, the installer receives an unambiguous pass or fail indication - eliminating subjective judgment and adding an additional layer of quality assurance to the installation process.

Example: successful pressure test
A system is pressurized to 100 psi. The pressure holds for 30 minutes. No leaks are detected. PEX Sliding Fittings pass the test.

Example: failed pressure test
A system loses pressure during testing. A leak is found at a fitting. The fitting must be replaced. PEX Sliding Fittings require re-installation.

Manufacturer guidelines
Follow the manufacturer's installation instructions. Each brand may have specific verification methods. PEX Sliding Fittings should be installed per guidelines.

Final verification summary
PEX Sliding Fittings connections are verified by visual inspection and pressure testing. The ring must be fully seated. The pipe must be inserted to full depth. No damage should be visible. Pressure testing confirms no leaks. PEX Sliding Fittings are reliable when properly installed. Example: verify every connection for peace of mind.