One: "Puh-puh" water sounds
Reasons: Excessive air in radiators or heating pipes can cause "air blockage," leading to water flow noises in the radiators.
Solution: In this case, it is necessary to "de-air" the radiator. The method is simple: just open the air release valve on the radiator and listen for the "psst" sound until the water flows smoothly.
"PAPA" sound of water
Reasons: Imbalance and uneven inflow and outflow of the radiator cause the characteristic "slapping" sound.
Solution: If the uneven inflow and outflow is the cause, close both the inflow and outflow valves of the radiator, then open the inflow valve and remove any air trapped above the radiator. After releasing the air, close the valve again. Then, open the outflow valve to balance the inflow and outflow rates, which will eliminate the noise.
"Splash, splash" sound
Reasons: The interface between the heating system and the heating radiators is not smooth, or the heating valves are not fully open, or the openings are too small. This causes the heating water to impact the inner wall of the radiators, creating a "sizzling" sound.
Solution: If the interface is not smooth, it is best to have a professional grind it down.
Four: "Gurgling" water sound
Reasons: Substandard welding processes can leave behind a lot of slag or a buildup of debris within the heating system. When the heating system is in operation, the water flow will flush out these impurities, leading to a "gurgling" sound in the heating pipes.
Solution: The best solution is to clean the radiators and remove any debris. However, since centralized heating has already started, users may find that adjusting the return valve does not have any effect. In this case, they can try to adjust the water supply to balance the inflow and outflow of the radiator. This will prevent the debris from being forced through, effectively reducing the noise. After the heating period ends, thoroughly clean the radiators.