Viessmann 7571784 Basic Vent Kit 80/125 Cg

Product Description

The VIESSMANN 7571784 is a basic vent kit designed for use with Viessmann heating equipment. The CG designation and 80/125 sizing indicate this kit is configured for coaxial vent applications, where an 80 mm inner flue pipe is paired with a 125 mm outer combustion air pipe. Vent kits of this type provide the termination and transition components needed to connect a condensing or sealed-combustion appliance to its exhaust and intake pathway. Licensed HVAC technicians and hydronic heating installers are the primary trade professionals who handle this type of installation.

This vent kit is intended for use with Viessmann heating systems that require an 80/125 coaxial venting configuration. It is suited for residential and light commercial applications where a single-pipe coaxial termination is specified. The CG designation typically applies to a specific series of Viessmann boilers or wall-hung heating appliances. Refer to the appliance installation manual to confirm that the 80/125 vent size matches the unit's vent collar and combustion air requirements before ordering.

Key Features

• 80/125 coaxial sizing accommodates an 80 mm inner flue and 125 mm outer combustion air pipe in a single concentric assembly
• CG-series configuration matches specific Viessmann boiler and heating appliance vent connections
• Provides exhaust and combustion air intake components in one kit, reducing on-site fabrication
• Designed for sealed-combustion and condensing appliance venting requirements

Compatibility

Designed as an OEM-style vent kit for Viessmann heating appliances requiring an 80/125 coaxial vent connection. Consult the specific appliance installation manual to confirm compatibility before installation.

Installation Notes

Installation should be performed by a licensed HVAC or hydronic heating technician in accordance with the appliance manufacturer's instructions and applicable local mechanical codes. Power down and isolate the heating appliance before beginning any vent work. Verify that all vent joints are fully seated and sealed per the manufacturer's specifications, and confirm that the vent termination location meets clearance requirements for combustion air quality and exhaust discharge. Do not mix vent components from different manufacturers without written manufacturer approval.

Technical Specifications

• Vent Size: 80/125 mm coaxial
• Configuration: CG (coaxial, concentric)

Standard Information

• Brand: VIESSMANN
• Manufacturer Part Number: 7571784