The Air Dome to Pressure Switch Hose is an OEM part for Whirlpool washing machines. This hose connects the air dome, which detects water levels, to the pressure switch, which regulates the water intake based on the detected level. Causes of a bad hose can include wear and tear over time, cracking due to exposure to hot water and detergents, or damage from pests. A compromised hose can lead to improper water level detection, affecting the washer’s ability to fill and rinse correctly.