38 inch Roof Termination Vent Pipe, Takagi/State/AO Smith 100266118
38 inch (965 mm) Roof Termination Vent Pipe, Centrotherm-type Concentric Venting. Takagi/State/AO Smith/Reliance item number 100266118
This gadget is part of the Direct Venting System for Takagi/State/AO Smith/American Heating/Reliance models 110C, 310C and 510C Gas Tankless Water Heaters. This uses the Takagi Proprietary APNC35 Concentric Vent Design which allows for an extremely long maximum venting length of 43 feet and up to 4 elbows.