Viega 136192 Grundfix B backflow protection 4986.2 DN100

Viega 136192 is a Grundfix B backflow protection unit, model 4986.2, intended for installation in through waste pipework. It is used to protect a building against backflow from the sewer system when there is a risk of wastewater returning into indoor areas.

The product is made of high-quality plastic and is equipped with a backflow flap and manual actuation. This design allows additional manual closing when higher safety or temporary protection of the pipework is required. Viega Grundfix B is suitable for professional installation in drainage systems where reliable protection against backflow is important.

The main advantages of this product are its quality design, service-friendly construction and the reputation of the Viega brand. Compared with basic non-return flaps, it offers a more purpose-built solution for building protection, manual operation and availability of spare parts. It is therefore suitable for more demanding installations where not only price matters, but also long-term system reliability.

Technical data
Manufacturer: Viega
Article: 136192
Model: 4986.2
Range: Grundfix B
Product type: backflow protection / non-return valve for drainage
Material: plastic
DN: 100
Design: for through waste pipework
Equipment: backflow flap, manual actuation
Application: drainage and waste pipe systems
Purpose: protection against backflow from the sewer system
Advantage: quality design, manual closing, service-friendly construction and availability of spare parts