Cathedral Ceiling Support Box Installation

6 duratech square ceiling support boxes are used to support chimney pipe and provide a positive connection between the support box and the chimney pipe with a built in twist lock feature. Use needle nose pliers to snap off the plastic tab from the rear of the switch box. Supervent 6 id class a double wall cathedral ceiling support box at menards send cancel mail in rebate is in the form of merchandise credit check valid in store only.