Olab Lelit Silent Green Pump Assembly Lelit Mara X Espresso Machine OLAB Silent Green Espresso Machine Vibration Pump 6mm IN 6mm OUT 230 240 Vac LELIT 4000034 ESPRESSO MACHINE COMPANY 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 Lelit MaraX Silent Pump Bella Barista 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