Compression union with gasket SANHA Therm ZWxGZ 42x1½ for metal and plastic pipes

The SANHA Therm ZWxGZ 42x1½ compression union with gasket is a threaded fitting designed for joining 42 mm and 1½" pipes made of metal or plastic. It provides a mechanical, sealed connection using an integrated gasket to prevent leaks in heating, potable water and general plumbing installations. The fitting is intended for use where a robust threaded union is required between dissimilar pipe materials or different pipe diameters.

Advantages

The compression union combines a threaded connection with an internal gasket to deliver a secure, leak-resistant joint without soldering or welding. Its design accommodates both metal and plastic pipes, reducing the need for separate adapters or transition fittings. Installation and disassembly can be carried out with standard tools, enabling maintenance or replacement without altering the piping system. The compact form factor fits into typical installation spaces for residential and commercial plumbing.

Suitable for

• Joining 42 mm to 1½" metal or plastic pipes
• Heating systems (radiators, boilers, distribution manifolds)
• Potable water supply lines
• General plumbing and service connections where a threaded union is required

Key specifications

• Connection type: compression union with integrated gasket and external thread
• Pipe sizes: 42 mm to 1½"
• Compatible materials: suitable for metal and plastic pipes when installed according to manufacturer guidance
• Sealing: factory-fitted gasket for leak-resistant joint
• Application areas: heating systems, potable water, general plumbing
• Installation: removable threaded union allowing maintenance access

How to use

Prepare both pipe ends by cutting square and deburring to ensure proper seating of the compression elements and gasket. Thread the union components onto the corresponding pipe ends, align the pipes, and hand-tighten the union nut. Final tightening should be completed with appropriate wrenches to the torque recommended by the pipe and fitting standards being followed; avoid over-tightening which can deform plastic pipes or damage the gasket. After assembly, inspect the joint and perform a pressure or leak test in accordance with local codes and system requirements.

Usage recommendations

Use compatible pipe materials and follow applicable installation standards. For plastic pipe installations, ensure correct temperature and pressure ratings are observed and verify compatibility with the fitting gasket material. Where frequent disassembly is anticipated, check the gasket condition periodically and replace it if wear or deformation is detected.