SiGMA-Li plumbing tee MTZ1612 16x1/2" male-threaded PEX connector

The SiGMA-Li plumbing tee MTZ1612 is a PEX connector designed for reliable transitions between 16 mm PEX pipe and 1/2" male threaded fittings. It allows a continuous flow path through the 16 mm inlet and outlet while providing a threaded branch for attaching valves, meters or other threaded components. The fitting is intended for potable water and heating installations where a secure PEX-to-thread junction is required and where corrosion-resistant performance and leak-tight connections are important.

Advantages

This plumbing tee combines a press-fit style connection for 16 mm PEX with a standardized 1/2" male thread, enabling straightforward integration of threaded accessories without adaptors. Its design facilitates a compact, space-saving installation and reduces the number of separate fittings required. The material and construction support long service life in domestic water and heating systems and minimize the risk of leaks when installed according to recommended procedures.

Suitable for

• Connecting 16 mm PEX supply and return lines in potable water systems
• Branching off to 1/2" threaded valves, angle stops or meters
• Small heating circuits and underfloor heating manifolds where a threaded branch is needed
• Repairing or modifying existing PEX installations that require a threaded outlet

Key specifications

• PEX connection size: 16 mm
• Threaded branch: 1/2" male thread
• Function: tee connector for splitting or joining PEX lines with threaded branch
• Intended media: potable water and heating fluids
• Typical installation orientation: in-line with perpendicular threaded outlet

How to use

Prepare the 16 mm PEX pipe by cutting squarely and de-burring the end. Insert the PEX end fully into the 16 mm connection until it reaches the stop, then secure according to the PEX system's joining method (crimp, clamp, push-fit or press) compatible with this SiGMA-Li tee. Apply appropriate thread sealant or tape to the 1/2" male thread and attach the threaded valve or fitting, tightening to the manufacturer's recommended torque. Verify alignment and support the piping to avoid undue strain on the joint before pressurizing the system and performing a leak test.

Usage recommendations

Use components and installation tools that are compatible with 16 mm PEX systems and follow local plumbing codes. Ensure threaded connections use suitable sealing material and avoid overtightening to prevent damage to threads. After installation, perform a pressure test at operating conditions to confirm leak-tight performance before placing the system into service.