If a dishwasher is not properly hooked up to a drain, the water will typically not have a designated outlet to flow into. Instead, it may spill out onto the floor or counter where the dishwasher is located. This can cause water damage and create a mess in your kitchen or wherever the dishwasher is installed.
To ensure proper drainage, a dishwasher should be connected to a drain line or plumbing system. Typically, dishwashers are connected to the kitchen sink's drain system. The dishwasher drain hose is usually connected to a high loop or an air gap, which helps prevent wastewater from flowing back into the dishwasher.
If you have an improperly installed or unconnected dishwasher, it's important to have it professionally installed or fixed to ensure proper drainage and prevent any potential water damage or plumbing issues.