Yulia - it sounds as if you didnt return the lever to the down position to enable the valve to open. But Im sure you did! Its just as when you are pulling a shot. The pressure relief valve is the one that directs water into the dreg tray. Thats what the tray is for mainly, rather than drips from the PF. Have you noticed this happening? Its the big pipe behind the group head. Either that or somehow you used so much cleaner that the valve got clogged. You should have got some foamy gunk coming out of the valve and into the tray. The rubber ring was the group head seal - it holds the shower screen in place as well.Originally Posted by Yulia link=1150105204/0#0 date=1150105204
Do you backflush without powder at all with your blind filter? I would guess that you had a seriously dirty shower screen - but the real experts here will probably have some clearer ideas for you!!