Do I need water filter for Automatic washing machine?

[PaviJohn]

Do I need External filter to use it with my washing machine? The seller told me that you need filter before the water goes to the washing machine to protect the machine. I'm not sure if i need one just because I have a filter near my water tank (here we use water tanks to get water) do I need to add the extra filter I should I ignore it?

[Whitegoodshelp]

You shouldn't need any filter. The water, whether hard or soft is dealt with by the detergent. In fact using water that has been treated and is too soft can have adverse effects - Connecting a washing machine to a softened water supply

Having said that I've assumed you are talking about some system that softens water? If it's a filter to remove impurities and you have a non-standard water supply that may be different. I'm also assuming you are in the UK.