A bar of pressure is the weight of air at sea level, or about 14 psi (from memory)
7 bar is 98 psi, I kind of suspect that the gauge may not be correct that is a LOT of pressure in the house plumbing system. Where I live, we are required to have a regulator on the inlet to the house set to no more than about 45 psi, by law. I live on the top of a hill so I have even less water pressure, about 2 bar or less so we have low water pressure problems.
I advise you to have the house pressure checked, the gauge on the machine should read the same as the house pressure when you are not brewing.
I do not understand what you mean with the statement, "9,10 back and forward" Are you saying it bounces around while brewing or that when brewing it is about 9 or 10 and when you stop, it drops back to 7?
That would be normal operation if you intended to mean the last sentence.
What happen was that the pump was puping just 2 bar of pressure! Since in my House there is a lot of water pressure(5to6bar) the pump just increase the other 2 bar! How do i know? I disconect the water hOse fron the house and put the hose in a bucket turn on the machine and it was reading 2 bar! I took the chance and buy a new pump from ebay for $70 new (cheap ahh) and it came today conect it adjust the relive valve on the pum and presto problem solve!
Even sow i have to do something about the house pressure, here(puerto rico) we dondt regulated the water pressure(that i know) i have to buy something to regulated the water sow dondt broke the machine! Thanks everybody for the help i hope that this thread help some one else with the same problem later im goin to post some photos from my bz-40
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