Hello fellow CoffeeSnobs
In August 2020, I bought a Profitec Pro 600 (dual boiler for those who are not familiar with the machine) with their flow control valve as an add-on. The machine is on a timer that starts it at 0630 and stops it at 1030 everyday. I make one piccolo a day, sometimes two, and I pull 250mL of water from the steam boiler a day to make a cup of tea for my wife. I freshwater back-flush the machine after each shot and chemical back-flush it about once a month.
With the valve completely closed and brew lever lifted, water still flows out of the group. It never used to. What's not so bad is that it flows at about 2mL/s - typical pre-infusion rate, right? Wanting to know why the brew water was flowing, I popped the mushroom valve open and was horrified to see scale and caked-on bits everywhere in such a short period of time! God knows what the boilers look like!
I'm in quite a soft water area (Clovelly, NSW), but even with that, I thought that I should protect my machine by using only BWT Magnesium filtered water in it, which I have done, and have purchased replacement filters from the shop from which I bought the machine since buying it.
I'm very interested in hearing about whether I was deluded in thinking that the BWT would prevent this. My previous machine, run without filtered water for years didn't have this level of muck when I pulled it apart!
In August 2020, I bought a Profitec Pro 600 (dual boiler for those who are not familiar with the machine) with their flow control valve as an add-on. The machine is on a timer that starts it at 0630 and stops it at 1030 everyday. I make one piccolo a day, sometimes two, and I pull 250mL of water from the steam boiler a day to make a cup of tea for my wife. I freshwater back-flush the machine after each shot and chemical back-flush it about once a month.
With the valve completely closed and brew lever lifted, water still flows out of the group. It never used to. What's not so bad is that it flows at about 2mL/s - typical pre-infusion rate, right? Wanting to know why the brew water was flowing, I popped the mushroom valve open and was horrified to see scale and caked-on bits everywhere in such a short period of time! God knows what the boilers look like!
I'm in quite a soft water area (Clovelly, NSW), but even with that, I thought that I should protect my machine by using only BWT Magnesium filtered water in it, which I have done, and have purchased replacement filters from the shop from which I bought the machine since buying it.
I'm very interested in hearing about whether I was deluded in thinking that the BWT would prevent this. My previous machine, run without filtered water for years didn't have this level of muck when I pulled it apart!

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