I had my S1 for about three months when I ran into the same problem covered on other posts - my heating element died. Returned it to LaSpazialeUSA to fix (how I got it from them is a long story

). When I got it back, it had developed a leak. I don't know the object's function, but the leak appears to be coming from the tall brass fitting on top. In picture 4, it is the object being touched by the purple(?) wire, directly "under" (from a 2-demensional perspective) the manual valve for the steam wand. In my machine it is covered by a thin piece of folded plastic. Question: can this be tightened safely?
Because of the leak, the pump is going on every 2 minutes! It turns on at 1.25 bars, and off at about 1.5 (in the red). Is there a way for me to adjust that setting, assuming I can get rid of the leak? I think I read somewhere it is supposed to go on at .8 and off at 1.3
Thanks for your help!