Since I don't have a hot water tap at the sink, and don't have a hot water pipe on my La Peppina (unless I put the funny steaming hat on with the steam wand on the inside), I make my Wife long blacks by cleaning the group, putting in the portafilter, and doing about three pulls to fill the glass with hot water before I pull a shot into the water. I have to take my drip tray off to get the cup to fit under the group.
Retaining the crema is a bonus with pulling it this way, but really I do this so that I'll have clean water. If I had a hot water tap at the sink, I'd use it instead.
