15B2 | 1/2" F & T 15# | Armstrong International Dimensions_7-1/2x3-11/16IN It helps regulate the air-to-fuel

15B2 1 2" F & T 15# Armstrong International Dimensions_7 1 2x3 11 16IN It helps regulate the air to fuel It helps regulate the air to fuel ratio a trusted brand in the industry Meets the specific venting requirements of 85 270 XC80 180 boilers Durable CPVC PVC construction for long lasting performance Easy installation and maintenance Benefits: Ensures proper venting of combustion gases for safe operation Protects the boiler and surrounding equipment from damage Complies with industry standards and regulations Reduces the risk of backdraft and ensures efficient boiler performance Applications: Specifically designed for use with Burnham 85 270 XC80 180 boilers Ideal for residential