What's the name of the fittings on the water pipe of Chevrolet Cruze engine?

Connecting pipes of throttling heater (water inlet pipe, water outlet pipe and throttling connecting pipe)

One is the water inlet pipe of the water tank and the other is the water outlet pipe of the water tank. Two water pipes on the engine are connected to the water tank. When the engine is working, the engine temperature will rise, and the engine will be cooled by the circulating flow of coolant between the engine and the water tank (and the intervention of the cooling fan). The accessories connected to the inlet and outlet pipes of automobile engines are called water pumps, water tanks and thermostats, depending on how the designer sets them up, how to set them up and how to set them up.