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Read our privacy policyThe Z-Flex Storm Collar 2SVSLS05 is a 5-inch diameter single-wall storm collar designed for use with Z-Vent systems. It is used in conjunction with flashing to provide weather protection at roof penetrations, ensuring a seal around the vent pipe to prevent water ingress. The storm collar requires a field-supplied sealant to be applied between the vent pipe's outer diameter and the collar's inner diameter for effective weatherproofing. This part is compatible with both single-wall and double-wall vent systems, as indicated by the "SW" and "DW" labels.