Series connection: it is a form in which a heating pipe is connected to one radiator and then to another radiator. Advantages: short pipeline and cost saving; No tee joint, reducing the hidden danger of water leakage; Disadvantages: it is impossible to control the temperature of each room independently; The end radiator may not reach the temperature.
Parallel connection: Also called double-tube parallel connection, the radiator is connected between the water inlet pipe and the return pipe in the form of a tee. Disadvantages: there are many three links, and the hidden danger of water leakage is great; Hydraulic imbalance, radiator uneven hot and cold.