Can be disabled.
However, the water supply valve (water inlet) cannot be closed. It must be ensured that cold water will automatically enter the water heater tank once the valve is opened to flow. The outlet valve is closed, the water heater cannot be used because the water inside cannot flow. This will not cause dry burning and there will be water in the water heater cavity.
The angle valve is an angle stop valve, similar to a ball valve. Its structure and characteristics are modified compared to a ball valve. Unlike the ball valve, the outlet of the angle valve is at a right angle of 90 degrees to the inlet. Angle valve is also called triangular valve, angle valve and angle water valve. This is because the pipeline has a 90 degree angle shape at the angle valve, that's why it is called vanangle ne, angle valve or angle water valve.