Cuno ICE140-S Single Cartridge Water Filter System for Home, Office, and Industrial Use - Pure Drinking Water Solution

The install was easy, however the pressure gauge is reading an incorrect pressure to high. I called 3M/ CUNO they would not replace the pressure gauge. I was told I needed to go back to seller Amazon. This seems rediculous to get a replacement part under warranty. I am trying to resolve this to get a replacement gauge