A water supply valve is required to control the water coming into the appliance if your refrigerator has a water and ice dispenser feature, or even just an installed ice maker. The supply valve is normally situated in the bottom backside regarding the ice box behind an access panel. The homeвЂ™s water supply generally travels through copper tubing connected to the valve inlet port. 继续阅读Changing a Refrigerator Liquid Provide Valve. So how exactly does a water supply valve work?