DuraVent 4″ Type B-Vent Gas Rain Cap

The DuraVent 4″ Type B-Vent Gas Rain Cap provides a durable, secure solution for protecting chimney vents from rain, debris, and animal intrusion. Constructed with a high‑grade aluminum inner layer and a galvanized steel outer shell, the cap combines corrosion resistance with structural strength. Its top‑twist lock mechanism ensures a tight, weather‑tight seal, making it ideal for vertical installations above the roof line.

Designed to perform in high‑wind conditions, this rain cap helps maintain optimal vent airflow while preventing moisture and foreign material from entering the system. Its robust construction and secure fitting make it a reliable addition to any residential chimney setup, enhancing both functionality and curb‑side appearance.