Final answer:
The correct answer is a 'drainage pipe.' This term refers to the connection required for a dry vent to link with a wet vent, helping maintain the air balance in a plumbing system.
Step-by-step explanation:
The dry vent connection to the wet vent shall be a drainage pipe. A dry vent is part of a plumbing system that allows air to enter the system to maintain proper air balance but does not carry water or waste. It is connected to the system above the fixture trap, allowing the wastewater to drain properly without siphoning water from the traps. Wet venting is a method where the vent conduit also serves as a waste conduit for one or more fixtures. The dry vent directly connects to this wet vent to allow for proper venting of the system.