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Yeah... The flow in mine would slow down to a crawl every month, descaling wasn't improving the situation much... Once I took it apart and cleaned everything up all the upgrades really came into their own...
Thinking about the flow bit you mentioned, how do you descale yours? I put the descaler in the water tank, put all the removable group head bits in the bottom of the tank and insert the tank in the machine under the group head so that it basically circulates when it pumps. The idea being it runs plenty of fresh descaler through the pump and circulates through the boiler. It usually pumps quite a lot of loose debris into the bottom of the tank which would otherwise get stuck behind the shower screen. I don't do it all the time, but the OPV also gets scaled up on mine (and it stops regulating the pressure), so I sometimes do a few forced pumps with the blind basket in to push fresh descaler through the valve.
Jonny69-
Same here, descaler dissolved into 1.5 litres of water, run through a cold machine for fifteen seconds then switched off and left to sit for fifteen minutes before flushing it all out again and rinsing through with another tank of clean water...
I'll take the shower screen out every time I descale and the plate comes out once every six months, they'll go into a bowl of vinegar while the machine's getting sorted out...
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Yeah... The flow in mine would slow down to a crawl every month, descaling wasn't improving the situation much... Once I took it apart and cleaned everything up all the upgrades really came into their own...
Bit confronting at first but it was pretty easy... The plastic around the switches cracked when I tried to get them out, that was the only casualty, the rest was simple enough and very satisfying once all done...