My partner wants one of these as she loves iced water (and so do I).I read up about them and it seems that there is an inline water filter.Apparently these cost approx £50 pounds each and have to be renewed after every 500 gallons of water that passes through it. As we currently drink water from the tap and it tastes good esp when chilled, does any one know if we can plumb in the fridge/freezer and leave out the water filter,whilst having no ill effects to the appliance.We live in a soft water area.(It appears the filta would be a brita).