SANHA Therm reducing tee 3xZW 28×18×28 – reducing pipe fitting for heating systems

SANHA Therm reducing tee 3xZW 28×18×28 is a metal pipe fitting engineered for heating and plumbing systems that require a change in pipe diameter. The fitting provides a reduced branch from a 28 mm main run to an 18 mm branch and back to 28 mm, enabling reliable diversion or connection of a smaller line within central heating, radiator connections and hot water circuits. The design supports steady flow and pressure conditions typical for residential and light-commercial heating installations.

Advantages

The reducing tee is manufactured to ensure dimensional accuracy and a consistent seal at each connection point, reducing the risk of leaks when installed correctly. Its construction allows compatibility with common installation methods used in heating systems and simplifies transitions between pipe sizes without the need for additional adapters. The compact shape conserves space in manifolds and installation cavities while providing a durable mechanical junction for temperature and pressure loads found in hot water circuits.

Suitable for

• Branching off a smaller-diameter heating circuit from a 28 mm supply line
• Connecting thermostatic radiator valves or distribution lines in central heating systems
• Hot water circulation loops requiring a reduced-diameter feed
• Retrofit work where a size change is needed without replacing existing mains

Key specifications

• Main run outside diameter: 28 mm
• Branch outside diameter: 18 mm
• Type: reducing tee with reduced branch (3xZW)
• Intended application: heating and hot water plumbing systems
• Material: metal compatible with typical heating system media
• Connection form: press-fit or fusion-compatible depending on SANHA Therm system requirements

How to use

Select the reducing tee matching the pipe material and diameter of the existing installation. Prepare pipe ends by cutting square and deburring, then follow the SANHA Therm system instructions for the appropriate joining method. Insert pipes fully into each port and complete the joint using the specified press or fusion tool to achieve a secure, leak-tight connection. Verify alignment and support the assembly to avoid stress on the joints. After installation, perform a pressure test of the heating circuit in accordance with local regulations to confirm sealing integrity.

Usage recommendations

Ensure compatibility with the specific SANHA Therm installation system and use recommended jointing tools and seals. Observe system pressure and temperature limits and provide adequate mechanical support for the change in pipe size to prevent strain on the fitting and connected lines.