This is the Rinnai Vent Kit 223183 for the Rinnai 2520FFU also known as the 53i and the 2532FFU also known as the 85i On Demand Water Heaters. Kit Includes a 12 Inch Vent Pipe and a 90 Degree Elbow. Rinnai is the Industry Leader in Tankless Water Heaters!
External link | Downloadable Files
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Product Spec Sheet
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