Straight union fitting with screw connection SiGMA-Li PERTZPŚ1612 for PE-RT 16×1/2"

Straight union fitting SiGMA-Li PERTZPŚ1612 is designed for reliable connections between PE-RT pipes with a 16 mm outer diameter and a 1/2" threaded appliance or valve. The fitting uses a screw (compression) connection that secures the pipe without the need for soldering or special tools, providing a tight mechanical joint suitable for potable water and underfloor heating systems where PE-RT compatibility is required.

Advantages

The screw compression design enables a quick and reversible installation while maintaining leak-tight performance when assembled correctly. Constructed to match the dimensions of 16 mm PE-RT tubing, the fitting provides consistent alignment and stable mechanical support at the joint. The threaded 1/2" connection allows direct attachment to standard valves, manifolds or fixtures commonly used in plumbing and heating applications.

Suitable for

• Joining 16 mm PE-RT pipe to 1/2" threaded valves, manifolds or appliances
• Domestic potable water supply lines
• Underfloor heating circuits using PE-RT piping
• Repair or retrofit work where a mechanical, reversible connection is preferred

Key specifications

• Pipe compatibility: PE-RT, 16 mm outer diameter
• Threaded connection size: 1/2" (female or male as applicable to the mating component)
• Connection type: screw/compression mechanical joint
• Typical applications: potable water, heating systems, underfloor heating
• Material compatibility: suitable for common plumbing metals and plastics when used with appropriate sealing

How to use

Cut the PE-RT pipe square and deburr the end before inserting it fully into the fitting. Ensure the pipe is pushed to the correct stop so the compression element can seat properly. Tighten the screw/compression nut according to the manufacturer’s recommended torque or until a secure mechanical grip is achieved, taking care not to overtighten. After assembly, pressurize the system and inspect the joint for leaks before completing insulation or covering.

Usage recommendations

Use compatible sealing materials and follow local plumbing codes. For long-term performance in potable water and heating systems, verify that the mating components and installation practices match the expected pressure and temperature ranges of the system.