Z-Flex Stainless Steel Increaser, 3" to 4"
Used to upsize a vent system.
• Vent material: AL29-4C stainless steel
• Certification: Tested to meet or exceed Underwriters Laboratories (UL) spec UL1738 and ULS636
• Approval: Cat II, III, IV venting
• Limited Lifetime Warranty
FAQ ("Frequently Asked Question")
Q: The Marey tankless water heater manual shows 2SVSIO304. Is this the same item?
A: Yes! The O in the item number should be a 0 (zero). Thus, the correct item number is 2SVSI0304.