Vacu Stack Chimney Cap

Vacu Stack stainless steel chimney cap designed for downdraft and back puffing problems. With no moving parts the Vacu Stack uses the wind to create an updraft. The Vacu Stack cures most wind related problems. The Vacu- Stack is made of 26-ga., 304 alloy stainless steel. To install, slide the Vacu-Stack into the pipe and seal with a bead of High Temperature Silicone Sealant. The Vacu-Stack carries a lifetime warranty.