The minimum water head required for a washing machine to operate can vary depending on the specific model and manufacturer. However, in general, washing machines require a minimum water pressure of around 0.5 bar (7.25 psi) for proper functioning.
Water head or water pressure refers to the force at which water is supplied to the washing machine. It's crucial to have sufficient water pressure to ensure that the machine can fill up with water, facilitate proper rinsing, and effectively clean the clothes. If the water pressure is too low, the washing machine may not be able to function optimally.
If you're unsure about the water pressure in your home, you can check with a plumber or consult your local water authority. They can provide you with information about the water pressure in your area and advise you on whether it meets the minimum requirement for operating a washing machine.