-   My problem is similar. I have a La San Marco 2 group head manual. My water flows at about 250ml in 7 seconds. Far too fast meaning that I am compensating to get my 60ml in 25 second shot by grinding very fine. The water pressure is set at 9 bars. How to I lower the water flow rate?
-   Guest
Back-flush the machine regularly and check your water hookup and make sure you to not have a small diameter water line. Other than that it is controlled by the water pump I believe. If the solenoid (the silver thing attached to the pump) used to start the pump is old it could slow down the pump start cycle.
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