. . . "The pressure goes up on starting the brew process.I didn't realise the HX tube went through the boiler, I will look into this.There is only 1 gauge on my machine, the boiler pressure, as seen here http://www.espressocoffeeshop.com/store/product127.htmlBTW it is spelt expresso here in France, by everyone including professionals ;)I didn't say the heater turned off for brewing, I said the heater was off" .