What causes your water pressure to drop? One thing that people don’t often think of is new appliances. For example if you had recently added a dishwasher or hot tub, you may be demanding more water flow that you can receive. You may notice it taking a bit longer to fill your bath tub or kitchen sink. Other things that will indicate you have low water pressure is discolored water flowing from the tap, or sudden temperature changes. This video explains the causes of such low water flow.