Grommet - male thread - N - 42mm-R5/4" IVAR.IVN81

Product detailed description

This stainless steel transition fitting serves as a critical interface between pressed pipe systems and externally threaded components in a range of industrial and commercial installations. It is commonly used in heating systems, sanitary plumbing, fire suppression systems, and compressed air circuits where secure and leak-free connections are essential. Installers working on new builds or retrofitting older systems benefit from the reliable sealing properties of this fitting when joining modern pressed piping to legacy threaded infrastructure. The adapter ensures compatibility between metric press connections and imperial thread standards, particularly in mixed-system environments.

Its application spans across residential, commercial and industrial sectors, including solar thermal systems and inert gas handling. The fitting is designed to maintain integrity under varying pressures and temperatures, making it suitable for both low-pressure and high-demand scenarios such as closed-loop circulation and high-temperature heat transfer systems. The installation requires precise alignment and pressing tools to ensure a tight seal, avoiding misalignment that could compromise system performance.

Technical parameters

Material	Stainless steel grade Wst. Nr. 1.4404 (AISI 316L), EPDM O-ring
Operating temperature	-20 °C
Nominal pressure	PN 16
Code	IVN81.4214
Brand	IVAR

The operational temperature range extends from -20°C to +85°C with a maximum allowable temperature of +120°C, allowing use in systems with moderate to high thermal variation. The PN16 rating indicates suitability for medium-pressure applications up to 16 bar, which is standard for many hydraulic systems. These parameters influence the choice of sealing material—EPDM—which remains stable within these limits and ensures long-term reliability.

Installation and connection

To install the IVAR IVN81.4214, align the 42mm press end with the corresponding pipe and apply the specified pressing force using a compatible tool. Ensure the internal O-ring is seated correctly before pressing. The R5/4" external thread should be cleaned and inspected for damage prior to assembly. A common mistake is failing to verify the 54 mm pressing depth indicator, which can lead to incomplete engagement and potential leaks. Always confirm the fit after pressing and visually inspect for any irregularities in the sealing surface.

Compatibility and accessories

This fitting is intended for use with standard 42mm stainless steel pipes and R5/4" male-threaded components. When sourcing, ensure that all associated parts—such as valves, regulators or manifolds—are compatible with the thread standard and pressure rating. Additional accessories like sealing compounds or thread tape are optional but may be recommended for specific system conditions. Refer to the IVAR product range for matching press tools and inspection gauges.

Technical background for designers

The fitting operates as a mechanical transition between two distinct connection methods: press-fit and threaded. The stainless steel body offers corrosion resistance, while the EPDM O-ring provides a flexible yet durable seal. The PN16 rating allows integration into systems with moderate hydraulic demands. Longevity depends on correct installation, consistent operating conditions within specified ranges, and avoidance of mechanical stress during installation. System efficiency is maintained through minimal flow restriction and uniform pressure distribution across the connection.

Service and operation

Routine visual inspections are recommended to detect signs of wear or leakage. There are no scheduled maintenance intervals specified for this component. If a leak occurs, disassemble the fitting and check the O-ring condition and pressing depth. Re-pressing may be necessary if the indicator shows insufficient engagement. Avoid over-tightening the threaded side, as this can distort the sealing surface and reduce effectiveness.

Frequently asked questions

Can the IVAR IVN81.4214 be used in solar thermal systems?
Yes, the temperature range and material properties make it suitable for solar applications involving heated fluids.

Is the EPDM O-ring resistant to common cleaning agents used in plumbing?
EPDM is generally compatible with mild detergents and sanitising agents typically found in sanitary systems.

What pressing depth indicator is used for verification?
The pressing depth indicator is set to 54 mm; ensure this mark is fully engaged during installation.

How does the PN16 rating affect system design?
The 16 bar pressure rating supports medium-pressure applications and should be considered when designing circuits involving pumps or closed loops.