bypass vent

bypass vent

A vent stack which runs parallel to a soil stack (or a waste stack) and is connected to it at frequent intervals.
References in periodicals archive ?
SunCoke Energy Inc (NYSE:SXC), a producer of metallurgical coke, declared on Wednesday that it has reached an agreement that resolved allegations of excess venting from bypass vent stacks beyond permitted limits at its Haverhill facility in Franklin Furnace, Ohio and Granite City facility in Granite City, Illinois, with the US Environmental Protection Agency (EPA) (Region V), the US Department of Justice and the states of Illinois and Ohio.