I dont know the machine well, is there a temp display, usually there is a temp display above the pressure on the display near the water dispenser. It doesn't usually read in degrees, more like 0.9 - 1.1 - 1.3 which relate to 100's of degrees assuming its a hx or double boiler machine. Head boilers dont necessarily have this display, but ecm dont make them I'm pretty sure. you'll know if the water is getting hot by touching the boiler. Bottled water would be usually fine, Legally you need to put a filter between your machine and the tap (commecially). You can get smaller ones than in a cafe environment, I think that the cafe ones are only a couple hundred dollars, inc; hoses, filter case, filter and seals. But they are essentially carbon filters, frankly there are many better kinds of filters on the domestic market, a simple clay filter gives better water. My intention when opening a cafe of my own, is to get a ph adjustable filter. Coffee has a ph of 3 I think (which isn't good for you) but that is partly due to the water you use. If you offset the ph with your water, then you can make a more ph neutral coffee. A bit off topic but relevant to the health of the espressohead
