How to distinguish the import and export of Kia Jiale heating water pipes?

Kia Jiale heating water pipes are divided into inlets and outlets according to the location of the radiator water pipes. The Kia Jiale heating water pipe is determined by the location of the radiator water pipe. The inlet and outlet pipes are on one side, the water inlet pipe is on the top, and the water outlet pipe is on the bottom. The inlet and outlet pipes are diagonal on both sides. At this time, the water inlet pipe is on the top and the water outlet pipe is on the bottom. The height of the inlet and outlet pipes is the same, depending on the number of partitions. The one with the smallest number is the water inlet pipe.