I really appreciate this discussion. I am considering switching from my current Synchronika (which is plumbed in) to the Profitec Pro 800 after seeing the updates to the Pro 800, and the "silent" operation is a big draw for me.

From what I am understanding in this thread, the noise is universal among machines that are plumbed in. Have others had any success attenuating the noise by reducing the line pressure to 2.0 bar?

Thanks!

Ben

You might also be able to get a solenoid with the next size bigger orifice or put a restriction in the line adjacent to the regulator. There are lots of inline restrictors used in RO systems, here's some examples.

https://wateranywhere.com/parts-accesso ... strictors/
https://www.freshwatersystems.com/colle ... estrictors

Since home machines tend to use water slowly, lengthening the time to refill the boilers will probably have no effect on most home users unless you're having a big parts.