Olab Lelit Silent Green Pump Assembly Lets see if this will Improve something. Im sure it will reduce the noise by 40% But they do say a pressure regulator helps with noise and to stabilize water flow aswell Silent Green Pump for Mara X 4000034 Lelit Hello baristas, I managed to reduce noise upgrade my Rancilio Silvia X PRO. I think anyone can do it, no special knowledge is required. 1. Changed the vibration pump to the quietest OLAB Lelit MaraX Silent Pump Bella Barista