Rinnai Tankless Rinnai 3" Inner Diameter - Direct Vent Pipe - Double Wall - 45 Degree Elbow for Condensing Tankless Water Heaters - Set of 2

45 Degree Vent Pipe Elbow for Condensing Tankless Water Heaters - Set of 2 Rinnai RCi Series Tankless Water Heaters utilize concentric venting with an inner pipe that is designed to withstand varying flue temperature conditions that may be experienced over the life of a condensing product. The Ubbink Rolux® condensing concentric vent system is considered part of the direct vent tankless water heater, and has been tested and approved with the appliance by a third party testing agency. Plastic Outer Vent F...