What is the reason why the pressure relief valve of water heater doesn't produce water?

during the water heating process of the water storage electric water heater, the heated volume of water and a small amount of residual air in the tank will expand, and the pressure in the tank of the water heater is too high, so it is necessary to release the pressure through the pressure relief valve. Under normal circumstances, the pressure relief valve will leak a small amount of water to release the excessive water pressure in the inner container of the water heater only when the water is heated by the storage electric water heater. Now let's talk about the reason why the pressure relief valve of the water heater doesn't produce water.

generally, the pressure relief valve does not produce water because the water heater is not working or the pressure relief valve itself has been damaged or blocked.

when the water heater is working to heat water, the heated volume of water and residual gas expands, and the overall pressure rises. When it reaches a certain level, a proper amount of water is discharged through the pressure relief valve to relieve the pressure, so as to ensure that the pressure in the water heater liner is not too high.

when the tap water is cut off, the one-way cut-off function of the pressure relief valve itself will be exerted, so that the hot water in the water tank will not flow back into the tap water pipeline.

summary 1. The reason why the pressure relief valve doesn't produce water is that the water heater is not working or the pressure relief valve itself has been damaged or blocked.

2. When the water heater is working to heat water, the heated volume of water and residual gas expands, and the overall pressure rises. When it reaches a certain level, an appropriate amount of water is discharged through the pressure relief valve to relieve the pressure, so as to ensure that the pressure in the inner container of the water heater is not too high.

3. When the tap water is cut off, the one-way cut-off function of the pressure relief valve itself will be exerted, so that the hot water in the water tank will not flow back into the tap water pipeline.