4" Wall Thimble, Type B Gas Vent

Details

Part Number: 016120
Manufacturer: Hart & Cooley
Model: 4RWT
Series: RWT
Description: B-Vent Gas Wall Thimble
Reference Code: 114698

The Hart & Cooley 016120 (Model 4RWT) B-Vent Gas Wall Thimble is a precision-formed venting accessory engineered for professional installation of gas vent systems. The RWT Series thimble provides a code-compliant wall penetration assembly that maintains proper clearance between the vent pipe and combustible materials. Constructed of durable galvanized steel, the component ensures safe passage of Type B gas vent through framed wall structures while preserving vent performance and thermal isolation.

Technical Specifications

• Manufacturer: Hart & Cooley
• Series: RWT
• Model Number: 4RWT
• Type: B-Vent Gas Wall Thimble
• Inside Diameter: 4-9/16 inches
• Outside Diameter: 6-1/2 inches
• Overall Length: 3-1/16 inches
• Material: Galvanized Steel
• Wall Thickness: 0.018 inch
• Application: Type B gas vent penetration through framed or masonry walls
• Operating Environment: Residential, commercial, and light industrial venting systems
• Compliance: Meets UL 441 and NFPA 54 requirements for gas vent installations
• Temperature Rating: Suitable for standard B-Vent flue gas temperatures
• Mounting Orientation: Horizontal wall pass-through

Application Notes

Designed for installation by licensed HVAC or mechanical contractors. The RWT wall thimble must be properly aligned with vent centerline and secured per manufacturer’s installation instructions. Maintain all clearance-to-combustible dimensions as specified for the associated B-Vent diameter. Ensure wall penetration is sealed per code requirements and inspected prior to operation. Intended for use with listed Hart & Cooley Type B gas vent components only.

Summary

The Hart & Cooley 016120 (RWT Series) B-Vent Gas Wall Thimble provides a durable, code-compliant solution for venting system wall penetrations. Constructed of galvanized steel and dimensioned for 4-inch vent assemblies, it ensures safe clearance, mechanical stability, and long-term reliability in professional gas vent installations.