by RayJohns on Sat Apr 02, 2011 1:34 pm
I generally pull shots until the water is down to the lower end of the sight glass (or to where there's only about 1/2 an inch remaining in the sight glass). Then the next day (or whenever I'm ready to pull more shots), I top it off with fresh water up to the top of the sight glass. I only use bottled water in the machine though (usually Fiji water if possible).
Every so often I do like someone else mentioned and just tip the machine over and pour all the water out. However, generally, I like to leave a bit of water in the boiler, so that nothing dries out. I think leaving some water in the bottom may help to avoid a situation where you have a constant wet/dry cycling effect, which might tend to accelerate wear, aging, etc.
Ray