Stopper PRESS, 26

Product detailed description

The IVAR press stopper is commonly used in residential and commercial buildings during the installation or maintenance of heating and plumbing systems. Installers often need to close open ends of ALPEX piping temporarily or permanently, such as when completing pipe runs or sealing unused connections. These fittings ensure tight and durable closures that maintain system integrity and prevent leaks. In systems with high thermal loads, the press stopper’s compatibility with elevated temperatures ensures long-term reliability.

Its compact design allows for use in tight spaces behind walls, under floors, or inside cabinets. The fitting requires no additional tools beyond standard pressing equipment, making it ideal for fast and efficient installation in both new builds and retrofit projects. The EPDM sealing material ensures chemical resistance to common fluids found in heating and water distribution systems.

Technical parameters

Material	Nickel-plated brass CW617N
Operating temperature	+120 °C
Nominal pressure	PN 10
Weight	0.076 kg
Code	510074
Brand	IVAR

The nominal pressure rating of PN 10 indicates suitability for systems with moderate hydraulic stress, while the maximum operating temperature of +120°C makes it appropriate for hot water and heating applications. The material combination of nickel-plated brass and EPDM ensures corrosion resistance and sealing performance over time. These parameters guide correct sizing and selection based on system conditions and fluid type.

Installation and connection

To install the press stopper, align the fitting with the cut end of the ALPEX pipe, ensuring the pipe is clean and free of burrs. Apply the press tool according to the manufacturer’s guidelines for the specific size (26 mm in this case). Verify that the pressing marks are evenly formed around the circumference and that the sleeve is fully seated against the pipe end. Common mistakes include using incorrect pressing force or misalignment, which can lead to incomplete seating of the sleeve or compromised sealing. Always verify that the press tool is correctly adjusted for the specified size and that the pipe wall thickness matches the fitting’s requirements. Avoid overtightening, which may deform the EPDM seal or damage the brass body.

Compatibility and accessories

This stopper is specifically compatible with ALPEX pipes and should be used with pressing tools suitable for the IVAR PT 5701 series. It works with standard ALPEX pipe connectors and valves of the same size. For larger installations, consider ordering in bulk — the standard packaging includes 5 per bag or 130 per full box.

Technical background for designers

The press stopper operates by mechanically deforming the stainless steel sleeve around the outer wall of the ALPEX pipe, creating a metal-to-metal seal reinforced by the EPDM gasket. The nickel-plated brass body provides structural stability and resistance to oxidation in humid environments. Its design integrates smoothly into press-fit systems, eliminating the need for welding or threading. System efficiency depends on proper alignment and pressing depth, which influence the contact surface between the sleeve and the pipe. Longevity is affected by exposure to aggressive chemicals and mechanical stress from vibration or thermal expansion.

Service and operation

During regular inspections, check the integrity of the press joint by looking for signs of leakage, deformation, or discolouration of the EPDM seal. No scheduled maintenance is required for this component unless operating conditions change or anomalies occur. Ensure that the surrounding piping is stable and does not exert lateral forces on the stopper, which could compromise the joint over time.

Frequently asked questions

Can this stopper be used for hot water systems?
Yes, the fitting is rated for temperatures up to +120°C, making it suitable for hot water and central heating applications.

Is it compatible with all ALPEX pipe diameters?
No, this model is specifically designed for a 26 mm pipe diameter. Other sizes require different press stoppers within the IVAR range.

What pressing tools are required for installation?
Use a pressing tool calibrated for the IVAR PT 5701 series and the specific pipe diameter (26 mm). Always follow the tool manufacturer’s instructions for pressing depth and force.

Can the stopper be removed once pressed?
Once the press joint is formed, the stopper cannot be removed without damaging the fitting or the pipe. It is intended for permanent installation.