What is the hose under distributor on a 96 Honda civic called it runs from block to firewall?

The hose under the distributor on a 1996 Honda Civic is called the heater outlet hose. It is responsible for carrying hot coolant from the engine block to the heater core, where it is used to heat the air inside the car. The heater outlet hose is made of rubber and is typically black in color. It is located on the passenger side of the engine block, just below the distributor.