One. Adjust the total drainage capacity of the toilet tank.
You can open the water tank lid. To the left, there is a helical adjustment rod above the water inlet valve. A simple water inlet valve consists of a float plus a rod. In general, increasing the adjustment will increase the flow rate, but the water level should not exceed the maximum, otherwise it will flow out through the pre-reserved pipe next to the drain valve. Decreasing the adjustment will decrease the flow rate.

Two. Adjust the partial water level in the toilet tank.
By adjusting the float on the drain valve, you can control the partial drain flow rate, such as the partial drain flow rate of 3 liters and the full drain flow rate of 6 liters. Adjusting the full drain flow rate does not affect the water volume. As the float moves up, the partial drain flow rate decreases, and as it moves down, the partial drain flow rate increases. The typical range is 2-4 liters.
Three. What to do if the water discharge in the sump is weak?
First, check if the toilet water level is too low or if there is insufficient water. You can adjust the water level of the inlet valve to the appropriate position.
If the situation does not improve, further investigation is required. First, check if the water tank drain is blocked by other components or if the key is too short, resulting in slow and limited drainage.
Inspect the sewer for obstructions, blockages, or bends that may impede water flow.
Four. How to stop the constant water flow from the sink drain.
Check if the flush valve lever returns immediately. If the lever does not return, the water tank will remain in the flushing state. Simply try resetting the toilet flush lever. If the water level sensor in the flush tank is too loose or too high, it can also cause continuous water flow. Simply adjust the water level sensor in the flush tank.