T-piece press - reduced, 18 x 16 x 18

Product detailed description

The press T-piece reducer is commonly used in residential and commercial heating and plumbing systems to create branch connections between pipes of differing diameters. Installers working with closed-loop heating circuits or water distribution lines frequently use these fittings to adapt existing pipe configurations or integrate new components such as valves, meters or heat emitters. The fitting ensures leak-tight connections under normal operating conditions and supports the mechanical integrity of the pipeline during expansion and contraction cycles.

In systems where multiple pipe sizes coexist—such as in renovations or hybrid installations—this T-piece allows for a smooth transition between 18 mm and 16 mm ALPEX pipes. It is particularly suitable for applications involving moderate thermal loads and where dimensional flexibility is required without compromising system performance.

Technical parameters

Installation and connection

Installers should ensure the correct orientation of the T-piece to align the inlet and outlet ports with the flow direction. The fitting is connected using a hydraulic pressing tool compatible with B-F-TH jaw types. The connection sizes are 18 mm, 16 mm and 18 mm respectively, requiring precise cutting and deburring of the pipe ends. Before pressing, the inside of the fitting must be free of debris to prevent misalignment or damage to the sealing ring. Common installation errors include insufficient tool calibration, incorrect positioning of the press marks and failure to verify the tightness after pressing.

Compatibility and accessories

This T-piece is designed specifically for ALPEX pipes and requires a stainless steel clamping sleeve and EPDM sealing ring for proper operation. It is fully compatible with other press fittings and valves of the same system. Additional components such as straight press couplings or elbows may be needed depending on the layout of the piping network. No alternative products are available for this specific configuration.

Technical background for designers

The operating principle relies on the deformation of the clamping sleeve during pressing, which compresses the sealing ring against the pipe wall to form a permanent joint. The nickel-plated brass body offers high chemical resistance and mechanical strength, making it suitable for both internal and external use. The design integrates well into closed-loop systems and supports thermal cycling without significant degradation. Longevity depends on maintaining clean, dry pipe surfaces and avoiding over-pressing, which can lead to premature wear of the sealing element.

Service and operation

No routine maintenance is required for this fitting due to its sealed construction. However, during inspections, technicians should visually check for signs of mechanical stress, corrosion or leakage around the press joint. Any anomalies should prompt further investigation of adjacent components and the overall system pressure balance. There are no defined service intervals for this component.

Frequently asked questions

Can the T-piece be used with non-ALPEX pipes?
No, the fitting is designed exclusively for ALPEX pipe systems and requires the corresponding pressing tools and sleeves.

Is the sealing ring replaceable after installation?
No, the EPDM sealing ring becomes permanently compressed during pressing and cannot be accessed or replaced once the fitting is installed.

What is the minimum bend radius when routing the pipe near the T-piece?
There is no specified minimum bend radius provided in the technical documentation; however, sharp bends should be avoided to prevent stress on the fitting.

Can this T-piece be used in steam systems?
No, the maximum operating temperature of +120 °C limits its use to hot water systems only.