Radiator Connection Fitting SiGMA-Li model PERTPGG1616T — upper and side inlet, 16/16 PE-RT

SiGMA-Li model PERTPGG1616T radiator connection fitting is engineered for upper and side inlet installations that connect radiators to 16/16 PE-RT piping. Designed for compatibility with PE-RT pipe material, this compact fitting provides a sealed connection point for central heating systems in residential and light commercial buildings where 16 mm PE-RT supply and return lines are used.

Advantages

The fitting offers a compact form factor that simplifies installation in confined spaces and supports both upper and side inlet orientations, reducing the need for additional pipe bends. Made for use with PE-RT pipes, it ensures consistent material compatibility and reliable hydraulic performance. Its design minimizes potential leak points and facilitates a clean handover between radiator valves and polymer piping.

Suitable for

• Residential radiator installations with 16 mm PE-RT supply and return lines
• Light commercial heating systems using polymer piping
• Situations requiring upper or side inlet connection to radiators
• Retrofit projects where space constraints demand compact fittings

Key specifications

• Connection orientation: upper and side inlet compatible
• Pipe compatibility: PE-RT (polyethylene of raised temperature resistance)
• Pipe size compatibility: 16 mm supply and 16 mm return
• Application: central heating radiator connection
• Typical use environment: residential and light commercial

How to use

Prepare the 16 mm PE-RT pipes by cutting squarely and deburring the ends. Insert the pipe into the fitting following the radiator valve manufacturer’s orientation for upper or side inlet. Ensure full insertion to the designated stop and tighten any required compression or locking mechanism according to the fitting instructions. After assembly, pressurize and perform a leak test in line with system commissioning procedures before putting the heating system into regular operation.

Usage recommendations

Use appropriate tools for cutting and deburring PE-RT pipe to maintain clean sealing surfaces. Verify compatibility between the radiator valve and the fitting orientation before installation. Follow local plumbing and heating codes and perform an initial pressure test after installation to confirm system integrity.