Originally posted by 3C333429353E5B0 link=1189689605/13#13 date=1302442585
1 - the brew pressure gauge
2 - a 20mm open ended spanner
I initially tried testing the pressure by measuring the volume out of the return pipe, however that indicated my pressure was at 5-6 bar...which I didnt think was likely. The pressure gauge sorted that out.
The open ended spanner just makes it easier to get in there, however I was able to do it with a shifting spanner as well.
It goes without saying that you should unplug the machine from the wall yada yada.
Theres a pic linked on this thread:
http://coffeesnobs.com.au/YaBB.pl?num=1143622054
which shows you what to adjust etc. Basically you turn that lock nut anti clockwise to loosen, then adjust the OPV clockwise to increase pressure, anti clockwise to decrease.
Tighten the locking nut when youre done without moving the OPV valve and test again
If you have the old OPV, this vid
[media]http://www.youtube.com/watch?v=mlElxFaCbXQ[/media]
shows you what you need to do
I think there are some threads on here which discuss the topic as well

Thats fine re the early turn-off if you prefer that, I dont think its going to overly affect what small amount of waters in the boiler by then.
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