Press nipple - reduced, 75 x 50

Product detailed description

Press-reduced couplings are commonly used in residential and commercial heating and plumbing systems to connect pipes of different diameters. Installers working with ALPEX piping systems often need to adapt to varying pipe sizes within the same circuit. These fittings ensure a secure, leak-free connection without the need for soldering or threading, making them ideal for systems where flexibility and ease of installation are required. The nickel-plated brass construction provides corrosion resistance, while the EPDM seal ensures compatibility with hot water and heating media.

Such fittings are typically installed in underfloor heating, domestic hot water, and central heating systems. They are used to connect copper or cross-linked polyethylene (PE-X) pipes to valves, radiators, or other components. The press connection method relies on a hydraulic tool to compress the sleeve around the pipe, forming a tight seal. This method is preferred in systems where traditional soldering is not feasible, such as in proximity to flammable materials or in concealed spaces.

Technical parameters

Material	Nickel-plated brass CW617N
Operating temperature	+120 °C
Nominal pressure	PN 10
EAN	4013960370706
Weight	0.88 kg
Code	86775190
Brand	IVAR

The nominal pressure of PN 10 indicates the fitting is suitable for systems operating at up to 10 bar. The maximum operating temperature of +120°C means it can handle hot water and heating circuits. The material combination of nickel-plated brass and stainless steel ensures durability in aggressive environments. These parameters are essential for correct sizing and system compatibility, especially in high-temperature applications.

Installation and connection

The installation process involves preparing the ALPEX pipe by cutting it cleanly and deburring the end. The press nipple is then slid onto the pipe, ensuring the EPDM seal is correctly positioned. A press tool is used to compress the stainless steel sleeve around the pipe, forming a watertight connection. The connection sizes are 75 mm and 50 mm, corresponding to the outer diameters of the pipes being joined. It is important to verify that the press tool is compatible with the fitting type (B-F-TH) and that the tooling is correctly aligned to avoid misalignment or incomplete compression. Common mistakes include using incorrect tooling, failing to clean the pipe ends, or applying uneven pressure during pressing.

Compatibility and accessories

This press-reduced coupling is specifically designed for ALPEX pipes and is compatible with other components in the IVAR PT 5700 R series. It requires a press tool of the B-F-TH type to complete the connection. No additional accessories are needed for standard installation. The EPDM sealing ring is pre-installed and does not require replacement unless damaged. Installers should ensure that all components in the system are from the same manufacturer to guarantee compatibility and system integrity.

Technical background for designers

The press-reduced coupling operates by compressing a stainless steel sleeve around the outer diameter of the pipe, creating a mechanical and hydraulic seal. The nickel-plated brass body offers high resistance to corrosion and wear, making it suitable for long-term use in wet environments. The EPDM sealing ring is compatible with hot water and heating media and remains flexible at elevated temperatures. The integration of this fitting into a system depends on the hydraulic design and the need for size adaptation. The service life is influenced by the operating conditions, particularly temperature and pressure, as well as the quality of the installation.

Service and operation

No regular maintenance is required for this fitting under normal operating conditions. However, it is recommended to periodically inspect the connection for signs of leakage or corrosion, especially in areas with high humidity or aggressive water chemistry. If a leak is detected, the fitting must be replaced, as the press connection cannot be re-used. There are no specific service intervals provided, but the fitting should be replaced if the system is decommissioned or if the connection is damaged.

Frequently asked questions

Can this press-reduced coupling be used with other pipe types besides ALPEX?
No, it is specifically designed for ALPEX pipes and is not suitable for other pipe materials or diameters.

What is the maximum operating temperature for this fitting?
The fitting is rated for a maximum operating temperature of +120°C, making it suitable for hot water and heating systems.

Is it possible to reuse a press-reduced coupling after installation?
No, the press connection is a one-time installation method. Once compressed, the fitting cannot be reused or re-pressed.

What type of press tool is required for installation?
A press tool of the B-F-TH type is required to compress the stainless steel sleeve and form a secure connection.