This Rigid Vent System roof flashing for gas fireplaces prevents vermin from making their way inside your enclosed space. The 4 1/2 -inch inner diameter and 7 1/2 -inch outer diameter are specially designed to meet National Fire Protection's standards for a venting system for gas-burning appliances. The roof flashing features a 12/12 pitch. Compatible with Superior gas fireplaces by Lennox and more.
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