- 4" 4RV-WT Wall Thimble
- Adjusts 4-1/8" to 7" to fit wall thickness
- Round Type B gas vent
- When installed according to manufacturer specifications, the wall thimble provides the required 1 inch air space to combustibles
- Tested and listed per UL-441 for installation as type "B" and B-W gas vents to be installed in single and multi-story buildings
4" 4RV-WT Wall Thimble. Adjusts 4-1/8" to 7" to fit wall
thickness. Round Type B gas vent. When installed according to manufacturer
specifications, the wall thimble provides the required 1 inch air space to
combustibles. Tested and listed per UL-441 for installation as type "B" and
B-W gas vents to be installed in single and multi-story buildings. From the
Manufacturer 4" 4RV-WT Wall Thimble. Adjusts 4-1/8" to 7" to fit wall
thickness. Round Type B gas vent. When installed according to manufacturer
specifications, the wall thimble provides the required 1 inch air space to
combustibles. Tested and listed per UL-441 for installation as type "B" and
B-W gas vents to be installed in single and multi-story buildings.