The height of the water tank required to provide sufficient pressure for a fully automatic washing machine depends on the specific requirements of the washing machine and the desired water pressure.
In general, most fully automatic washing machines are designed to work with standard water pressure from a municipal water supply or a water pump system. The recommended water pressure for washing machines typically ranges from 1 to 10 bars (14.5 to 145 psi).
To ensure adequate water pressure, it's common to have a minimum of 2 to 3 meters (6.5 to 9.8 feet) of height difference between the water level in the tank and the washing machine's water inlet. This height difference creates a gravitational force that helps generate the necessary pressure for the water to flow effectively into the machine.
Keep in mind that other factors, such as the length and diameter of the pipes, the presence of any obstructions or valves, and the efficiency of the washing machine's internal water pump, can also affect the overall water pressure and flow rate.
It's best to consult the manufacturer's specifications or the user manual of your specific washing machine model for the recommended water pressure requirements. If you have concerns about the water pressure in your home or the suitability of your water supply, you may want to consider consulting a plumber or contacting the manufacturer for further guidance.