The following faults may occur in the use of the water tank sewer pipe:

1. Leakage: The joint of the water tank sewer pipe may leak due to long-term use or weak connection. Leakage may be caused by loose joints, aging sealing rings or broken pipes. Leakage will lead to the loss of water in the water tank, affect the normal operation of the cooling system, and may lead to overheating and damage of the engine.

2. Blockage: The inside of the sewer pipe of the water tank may be blocked due to deposits, dirt or air bubbles. Blockage will cause the coolant not to flow out of the water tank smoothly, which will affect the cooling effect of the cooling system and increase the risk of engine overheating.

3. Rupture: The sewer pipe of the water tank may be broken due to external impact, overheating or aging. Cracking may lead to coolant leakage, affect the normal operation of the cooling system, and may cause damage to other components.

4. Corrosion: The sewer pipe of the water tank may be affected by corrosive substances in the coolant, resulting in corrosion of the metal parts of the pipeline. Corrosion will reduce the wall thickness of the pipeline and increase the risk of rupture.

5. Aging: The sewer pipe of the water tank may age due to long-term use or environmental factors. Aging will reduce the elasticity and durability of pipelines, and increase the risk of leakage and rupture.

In order to avoid the failure of the water tank sewer pipe, regular inspection and maintenance are necessary. This includes checking whether the joints of water pipes are tight, checking whether there is any blockage inside the water pipes, replacing the seriously aging water pipes regularly, and using high-quality coolant. In addition, avoiding external impact and using corrosive coolant are also helpful to prolong the service life of the water tank sewer pipe.