Round double-wall gas vent wall thimble used to maintain clearance to combustibles and serve as a firestop when venting gas-fired appliances, water heaters, furnaces, and stoves.
Specifications
- Type B, 4-inch diameter
- Adjusts from 4-1/8 inches to 7 inches to fit wall thickness
- Outer material: 28 gauge galvanized steel
- Inner liner: aluminum
- LockTab feature for securing pipe when required by local code
- Meets UL 441 and NFPA 54 / NFPA 211 standards
Safety
- Check appliance installation instructions for details
