Fitting tee welded female SiGMA-Li PERTTW2012 — PE-RT polyethylene 20×1/2×20

Welded female tee SiGMA-Li PERTTW2012 is a PE-RT (polyethylene of raised temperature resistance) plumbing fitting with dimensions 20×1/2×20. It is designed to create a branch connection between two PE-RT pipes and a 1/2" female threaded outlet for valves, meters or threaded adapters. The fitting provides welded (socket or electrofusion-style) connections on the two main runs and a female thread in the branch, making it suitable for hot-water distribution and underfloor heating manifolds where a threaded connection is required.

Advantages

The fitting combines a corrosion-resistant PE-RT body with a precisely machined female thread, ensuring a stable transition between plastic piping and metal-threaded components. Welded ends provide leak-resistant joints when joined to compatible PE-RT pipes using the appropriate welding method. Its compact tee form factor allows installation in tight spaces and reduces the need for additional transition fittings.

Suitable for

• Hot-water distribution systems
• Underfloor heating circuits and manifolds
• Connections to valves, flow meters and pressure gauges
• Service branches in residential and light commercial plumbing

Key specifications

• Material: PE-RT (polyethylene of raised temperature resistance) body with internal female thread
• Connection type: welded connections on two ends, female threaded branch
• Dimensions: 20×1/2×20 (pipe size × thread × pipe size)
• Temperature compatibility: suitable for heated water systems (consult system limits for exact temperature and pressure ratings)
• Use environment: indoor plumbing and heating installations

How to use

Prepare PE-RT pipes by cutting squarely and deburring the ends. Join the two main ends of the fitting to the PE-RT pipes using the recommended welding method for the piping system (socket welding, electrofusion or suitable manufacturer-approved technique). Ensure correct insertion depth and follow welding equipment settings and cooling times. Use the female threaded branch to attach a valve, meter or adapter using appropriate sealing (PTFE tape or thread sealant) and torque values for the installed component. After assembly, pressure-test the system according to applicable standards before putting into service.

Usage recommendations

The fitting should be installed by qualified personnel familiar with PE-RT welding procedures and local plumbing regulations. Verify material compatibility between the fitting’s female thread and the threaded component to avoid galvanic corrosion; use compatible adapters or dielectric unions where required. Always follow the piping system manufacturer's temperature and pressure limits and perform a pressure test after installation.