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 Hi team. For some time now, I've noticed a strange pump behavior in my Sage Barista Pro. This is my third Sage espresso machine. The first classic Barista worked for a few years, and I upgraded to the Lelit ULKA ARS Cime Fluid O Tech Olab vibration coffee pump ULKA EX5, EP5 Blue Star Coffee Hey guys,, Just a little tune up and update on my Classic: ulka pump replaced with olab's silent green pump very close to a finished project. But there is still things to come :) possible by the end Lelit Silent Pump Vibrationspumpe 4000034 Espresso Kultur Pompe Valvole Lelit Elektra, La Pavoni, Bugatti, Isomac, Pontevecchio, Quick Mill, Lelit, Zacconi