Hi,

Did you ever find a solution for this issue? I am exactly in the same boat as you were now and looking to see what was successful.

I've had them at two different locations with four different ref/ice-makers for many years with zero problems. (Household water-pressure 55psi at one location and 65 at the other.)

Kinetico offers an air-bladder buffer for "ice-maker issues" so I assume there are problems here and there. However, I strongly suspect the device isn't related to pressure as much as for applications with long runs of undersized supply-hose. My locations used 3/8 supply hose with long runs and had no issues. Because I had no issues, I never asked them about it directly. If I was concerned, which you seem to be, I'd call them and ask.

Using any RO you'd want to bypass (eliminate) the fridge filter if it has one.

Call your Kinetico dealer. IIRC, there is a mod to address this issue.

I think you have to leave the refrigerator filter in, in order for the K5 to work with the icemaker.