16" DuraChimney II Chimney Cap 16DCA-VC1 16" DuraChimney II Chimney Cap is used to terminate the chimney system. Required on all installations. Slides over the previous section of DuraChimney II pipe to allow for chimney height adjustment. Includes a Spark Arrestor. Diameter: 16" Includes spark arrestor Designed to stay cool on the outside to provide a hot draft on the inside and to provide a fire-safe design. For use with masonry fireplaces which burn wood oil coal or gas. The double-wall air-cooled design allows the chimney to expand both radially and lengthwise under high temperatures. Lightweight design which eliminates the need for field assembly of pipe sections allowing for faster installation. Tested and listed for continuous operation at 1000 °F flue gas temperatures one hour at 1400 °F and ten-minutes at 1700 °F 2†clearance to combustibles.