Anyway, I eventually changed the sight glass seals without breaking
anything (hallelujah!) and upon reassembly and firing up the machine I
now got steam coming from the safety valve. Given the safety valve was
not leaking before I changed the sight glass seals I know the problem
doesn't lie with the little rubber gasket in the safety valve. But to be
sure I changed this as well, retightened the seals around the top and
bottom of the sight glass, and upon firing up the machine, the safety valve
was still giving off steam and eventually causing condensation to drip
down to the bottom of the machine. Not good. Since I have made a
pressure gauge to fit the cremina I then check to see if the pressure
was too high, but no, it is fine, well under 1 BAR. Therefore, too high a
pressure in the machine isn't the reason for the safety valve leak.

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