Hi William, This is an older model which is no longer available so I can't make a physical check. According to some quick research of manuals etc. it seems as though the machine does not have or accommodate the in-tank filter that is typical of most super-automatic machines. There are other options like pad filters that sit in the tank and remove/reduce chlorine and mineral levels. Here's a good one: www.wholelattelove.com/products/bwt-bestsave-m-anti-scale-filter

Just under 15 inch so that it fits under most standard size cupboards.