The reason your brew pressure gage displayed ~ 11 bar is as Dan said. The reason you need a water pressure regulator on the inlet side of the pump is to provide some resemblence of consistency to the machine's pump AND to lessen the burden on other machine components such as the solenoid fill valve for the steam boiler. A set value of inlet pressure around 30-35 psi OR whatever Mr. Brewtus says in his install manual would be good.

A good choice would be found here: http://www.chriscoffee.com/products/home/plumbing along with their water filtration/softening system - ~ $125 for that and ~ $30 for the pressure regulator.

Michal
When you get ready to re-plumb the house look into PEX pipe and a manifold distribution.
Much more flexible install than CPVC.
No taste issues.
Saves water too.

Yeah my plumber is using it more and more. Did his whole house with it. He is also a filtered water expert.
Loves the stuff.

I took a look at the PEX and it looks quite good. A few questions, if I repipe with manifold will they have to drill new holes to get a separate pipe to each fixture? How does the cost compare vs copper and CPVC? I called a few plumbers and they don't install PEX, is there a website with a list of plumbers?

The manifold goes where the source for the distribution is - aka the basement, garage, whatever. PEX is used in a "home-run" type distribution. There's fundamentally no difference between it and copper or CPVC, it's just a flexible blue plastic pipe for cold and red for hot. It's easy to run as old work since it's flexible and doesn't require any joints in the walls - other than when it's stubbed to the fixtures.

Google pex pipe installers or installation and your zip. Shouldn't be too hard to find someone.

I tried the google search, nothing. Went to a PEX manufacturer searched and none available. I guess I'll call around to some other places in cities around me. What I meant was when you have the manifold you must a have a separate line to each fixture. The poly I have branches and branches. So would they have to make a hole every foot to make room for the new pipes? Right now the plumbing is done in a VERY stupid way. The heater is outside (Rinnia Tankless) and the water goes upstairs and then back down and to downstairs. I read with the manifold you don't have pressure loss with more than one fixture open?

I don't see any reason it can't be hooked up distribution style, but the main benefit of pex is there are less joints in the wall for potential leaks.