Fittings - for PEX pipe, 17 x 2 PEX - EK

Product detailed description

This threaded PEX fitting is commonly used in residential and commercial heating and sanitation systems. Installers and plumbers rely on such fittings when connecting PEX pipes to valves, radiators, or manifold systems. It ensures a secure and leak-free connection even under high thermal stress, making it ideal for underfloor heating, domestic hot water circuits and central heating applications.

The fitting is designed for use with 17 x 2 mm PEX pipes and integrates easily into systems requiring a Euroconic (EK) thread interface. The EPDM sealing ring ensures compatibility with hot water and steam environments. Its compact design allows for installation in tight spaces, while the CW617N brass construction provides corrosion resistance and long-term durability in aggressive environments.

Technical parameters

The operating temperature limit of +120°C makes this fitting suitable for hot water and heating applications. The PN 10 rating indicates its ability to handle medium-pressure conditions. These parameters help determine whether the fitting is appropriate for specific system pressures and temperatures during design and installation stages.

Installation and connection

Correct installation involves aligning the PEX pipe and inserting it fully into the fitting along with the EPDM sealing ring. Ensure the pipe is clean and free of debris before assembly. Hand-tighten the nut onto the thread, then use a wrench (AC 670 / AC 671) to apply a torque between 30 and 40 Nm for final tightening. Avoid over-torquing to prevent damage to the sealing ring or thread deformation. Always follow the manufacturer’s alignment diagrams to ensure correct positioning of components.

• Verify the PEX pipe is cut cleanly and free from burrs.
• Ensure the EPDM ring is undamaged and correctly positioned.
• Do not apply lubricants containing mineral oil — only silicone-based lubricants are acceptable.
• Double-check the orientation of the fitting relative to the pipe direction to avoid misalignment.

Compatibility and accessories

This fitting is compatible with standard 17 x 2 mm PEX tubing and Euroconic-threaded components. Additional accessories such as wrenches (AC 670 / AC 671) may be required for proper tightening. For larger-scale projects, consider ordering in bulk quantities, as the product is supplied in packs of 40 pieces per bag or 320 pieces per box.

Technical background for designers

This threaded PEX fitting functions by compressing the EPDM sealing ring between the pipe wall and the internal seat of the fitting. The Euroconic thread ensures a mechanical lock and contributes to the sealing effectiveness. The CW617N brass material offers high resistance to corrosion and thermal expansion, making it suitable for both hot and cold water systems. The PN 10 rating ensures safe operation within typical domestic and commercial pressure ranges. Longevity is supported by proper installation, regular visual inspections and avoiding exposure to incompatible media such as mineral oils.

Service and operation

Regular checks should include inspecting the fitting for signs of leakage, corrosion or wear. The EPDM sealing ring should remain intact and free from deformation. If the fitting is exposed to extreme conditions or suspected damage, disassemble and inspect the components. No scheduled service intervals are specified in the technical data. Always ensure the sealing surfaces are clean and free from debris prior to reassembly.

Frequently asked questions

Can this fitting be used with PERT or other PEX variants?
Yes, provided the outer diameter matches the 17 x 2 mm specification. Compatibility depends on the pipe’s outer dimensions rather than the material type.

Is a specific tool required for tightening the fitting?
A wrench suitable for the AC 670 / AC 671 specifications is recommended to achieve the correct torque range and prevent over-tightening.

Can the EPDM sealing ring be replaced separately?
Not according to the technical documentation. The sealing ring is integrated into the fitting and cannot be replaced individually after installation.

What is the maximum allowable tightening torque?
The tightening torque should not exceed 40 Nm. Exceeding this can cause deformation of the fitting or damage to the sealing ring.