Selkirk 4MSC Gas Vent Storm Collar 4 Inch Type B

Product Description

The SELKIRK 4MSC is a 4-inch storm collar designed for use with Type B double-wall gas vent pipe systems. Fabricated from G90 galvanized steel on the outer wall, it provides a weathertight seal where the vent pipe penetrates a roof deck, blocking wind-driven rain and debris from entering the vent assembly. The lock tab non-positional locking system secures the collar in place without requiring rotational alignment, simplifying installation. This component meets UL 441, ULC S605, and NFPA 54/211 standards, making it appropriate for code-compliant gas venting installations across a wide range of applications.

The 4MSC fits 4-inch diameter double-wall Type B gas vent pipe and is suitable for residential, commercial, and industrial settings. Common applications include venting fired appliances such as gas furnaces, water heaters, and stoves. The RV series design is built for jobs where a reliable, code-listed roof penetration seal is required on natural gas or propane appliance venting systems.

Key Features

• G90 galvanized steel outer wall construction for corrosion resistance in outdoor roof environments
• Lock tab non-positional locking system — no rotational alignment required during installation
• Listed to UL 441, ULC S605, and NFPA 54/211 for use in code-compliant gas vent systems
• 4-inch diameter sizing matches standard Type B double-wall gas vent pipe
• Suitable for residential, commercial, and industrial fired-appliance venting

Compatibility

Designed for use with 4-inch diameter Type B double-wall gas vent pipe systems, including applications on gas furnaces, water heaters, stoves, and other fired appliances in residential, commercial, and industrial installations. Part of the SELKIRK RV series.

Installation Notes

Storm collars are typically installed by licensed HVAC technicians or plumbers as part of a gas appliance venting system. Shut down and allow the appliance to cool before beginning any vent pipe service. Follow NFPA 54, NFPA 211, and local authority having jurisdiction requirements for vent pipe clearances and roof penetration details. Do not substitute this collar on vent pipe diameters or system types other than those specified on the product listing and in the installation instructions.