Viega 1111

Viega 1111 is a steel transition fitting designed for press connection systems. Made of galvanised non-alloyed steel with an EPDM sealing element in a polygon shape, the fitting is intended to join a 28 mm pipe to a threaded R connection. It is supplied in packs of five and is suitable for plumbing installations requiring durable, corrosion-resistant metal fittings.

Advantages

The galvanised non-alloyed steel construction provides corrosion resistance and mechanical strength, while the EPDM polygon sealing element ensures a reliable seal on the threaded connection. The press connection design speeds up installation compared with traditional soldering or welding methods and reduces the need for on-site sealing materials.

Suitable for

• Plumbing installations connecting 28 mm pipelines to 3/4" R-threaded fixtures
• Indoor water distribution systems where metal fittings are required
• Applications needing press-fit assembly for faster installation

When it may not be suitable

This fitting may not be appropriate for systems that require non-metallic components or where specific alloyed steel grades are mandated. It is also unsuitable for pipe diameters other than 28 mm or for thread standards that differ from R (3/4").

Key specifications

• Material: Galvanised non-alloyed steel
• Connection types: Press connection and R-thread (3/4")
• Sealing element: EPDM, polygon profile
• Nominal pipe diameter: 28 mm
• Pack quantity: 5 pieces

How to use

Prepare the pipe end by deburring and ensuring it is clean and dry. Insert the pipe into the press connection and use the appropriate press tool and jaw for the fitting size to make a permanent joint. Tighten the R-threaded side to the mating component using suitable tools, ensuring the EPDM polygon seal seats correctly to prevent leaks. After installation, inspect the joints visually and, where applicable, perform a pressure test following local plumbing codes.

What to consider before purchase

• Confirm pipe diameter is 28 mm and that the mating thread is 3/4" R
• Verify compatibility of press tools and jaws with this fitting size
• Ensure a metal (galvanised steel) fitting is acceptable for the application environment

Usage recommendations

Use certified press tools matched to the fitting size and follow manufacturer guidance for pressing parameters. Store fittings in a dry place to avoid surface corrosion prior to installation, and use the product within its intended mechanical and temperature limits for potable or heating systems as required by local regulations.