Z-flex ZF-2SVEWMFA03 Z-vent Adapter 3 Inches

Product Description

The Z-FLEX ZF-2SVEWMFA03 is a 3-inch Z-Vent starter adapter designed for use with Weil McLain CGI and CGS series appliances. This fitting serves as the initial connection point between the appliance flue outlet and the Z-Vent positive-pressure venting system. It provides a secure, gas-tight transition from the unit collar to the single-wall or double-wall vent run. Licensed heating technicians install this component during new installations and system retrofits. The adapter is rated for the high-temperature condensing flue gases produced by these boiler and water heater configurations, making it a critical fit-for-purpose component rather than a generic vent fitting.

This adapter is used in residential and light-commercial hydronic heating installations where Weil McLain CGI or CGS appliances require a properly matched vent starter to begin the Z-Vent flue run. The CGI and CGS designations identify specific Weil McLain cast-iron and gas-fired boiler product families that require compatible positive-pressure vent accessories. This starter piece establishes the flue pathway from the appliance collar before transitioning to standard Z-Vent sections and termination components.

Key Features

• 3-inch diameter matches CGI and CGS appliance flue collar sizing
• Engineered as an appliance-specific starter for Z-Vent positive-pressure systems
• Provides a gas-tight connection at the appliance-to-vent transition point
• Compatible with Z-Vent single-pipe venting system components downstream
• Designed for high-temperature condensing flue gas service

Compatibility

Designed for use with Weil McLain CGI and CGS series appliances requiring a 3-inch Z-Vent starter adapter at the appliance flue outlet.

Installation Notes

Installation should be performed by a licensed HVAC or plumbing technician in accordance with local mechanical codes and the appliance manufacturer instructions. Shut down and isolate the appliance from gas and electrical supply before beginning any vent work. Verify that all Z-Vent joints are properly engaged and sealed per the Z-Flex installation guide before restoring appliance operation. Do not mix Z-Vent components with non-compatible vent system brands or materials.

Technical Specifications

• Diameter: 3 inches
• Weight: 2 pounds
• UPC: 663053035957

Standard Information

• Brand: Z-FLEX
• Manufacturer Part Number: ZF-2SVEWMFA03