Knee press 90°, 75 x 75

Product detailed description

This 90° press elbow is commonly used in residential and commercial heating and plumbing systems to change the direction of flow in ALPEX piping. It is suitable for applications where a compact, durable and corrosion-resistant fitting is required. Installers working on underfloor heating, central heating, or domestic hot water systems will find this elbow ideal for connecting pipes in tight spaces or where a right-angle bend is necessary. The nickel-plated brass construction ensures compatibility with a range of fluids and media, making it suitable for both new builds and retrofit projects.

Typical installations include use in underfloor heating manifolds, radiators, and pipe runs where a 90° turn is needed. The elbow is often found in systems where the operating temperature does not exceed +120°C and the pressure remains within PN10 limits. It is commonly used in conjunction with ALPEX press tools and sleeves, ensuring a secure and leak-free connection when installed correctly.

Technical parameters

Installation and connection

Installation requires the use of a press tool compatible with ALPEX systems. The elbow is connected to ALPEX pipes of equal diameter using a stainless steel sleeve and EPDM sealing ring. The press tool must be correctly aligned with the fitting to ensure even pressure distribution and a secure connection. The installer should verify that the sleeve is properly seated and that the pipe is free from burrs or deformations before pressing. Common mistakes include using incorrect sleeve sizes, misalignment during pressing, or failing to clean the pipe ends before installation, which can lead to leaks or reduced system efficiency.

Compatibility and accessories

This press elbow is designed for use with ALPEX pipes of the same diameter. It requires a stainless steel sleeve and EPDM sealing ring for a secure connection. The fitting is compatible with press tools of type B-F-TH. Installers should ensure that all components are from the same system to avoid compatibility issues. No additional products are required for standard installation.

Technical background for designers

The press elbow operates by compressing the stainless steel sleeve around the pipe and fitting, creating a mechanical and hydraulic seal. The nickel-plated brass CW617N material offers high resistance to corrosion and wear, making it suitable for long-term use in wet environments. The EPDM sealing ring provides flexibility and ensures a tight fit. The elbow is designed to integrate into press-fitting systems, where the sleeve and press tool work together to create a durable joint. The service life and efficiency of the elbow depend on correct installation, proper alignment, and adherence to system pressure and temperature limits.

Service and operation

Once installed, the elbow requires no regular maintenance. However, during system inspections, installers should check for signs of leakage, corrosion, or mechanical damage. If the fitting is part of a system that experiences frequent pressure fluctuations, it is advisable to inspect the joint for any signs of loosening or wear. No specific service intervals are required for this product.

Frequently asked questions

Can the IVAR press elbow be used with copper pipes?
No, this elbow is specifically designed for use with ALPEX pipes and requires a stainless steel sleeve for a secure connection.

Is the elbow suitable for use in hot water systems?
Yes, the elbow is rated for a maximum operating temperature of +120°C, making it suitable for hot water and heating applications.

Can the press elbow be used in press tools of other types?
It is compatible with press tools of type B-F-TH. Using other tool types may result in an incomplete or insecure connection.

What is the maximum pressure rating of the elbow?
The elbow is rated for a nominal pressure of PN10, which is suitable for most standard heating and plumbing systems.