How long is the heater water pipe of Volvo excavator 460?

The heater water pipe of Volvo excavator 460 is 15 cm long. The Volvo excavator 460 heating pipe is a pipe that brings the heat of the engine into the car through the water in the car water tank to warm the car. It is one in and one out. If installed incorrectly, the water flow may be too smooth, and it will not have much impact. The correct way to turn on the heater is to start the engine to preheat, wait until the engine temperature pointer reaches the middle position, and then turn on the heater.