2007 Toyota Tacoma - Coolant/Heater Pipe

A coolant or heater pipe is a hard plastic line used to transport coolant between a vehicle's cooling system components. Both ends of a coolant pipe are usually attached by coolant hoses, and in some cases, the coolant pipe may act as a junction to redirect coolant to other engine components. Often, a coolant pipe may be connected between the radiator and water pump, or between the water pump and the heater core.