What are the correct temperature and pressure requirements for the water supply line?

For the ice maker to operate properly, water pressure of 20 to 125 psi is required. If the refrigerator is installed in an area with low water pressure (below 20 psi), a booster pump can be installed to compensate. For a reverse osmosis system, the pressure of the water supply going to the refrigerator's water inlet valve needs to be between 241 and 827 kPa. (Page 17 and 23)