The drain pipe size for a built-in dishwasher is typically 3/4 inches in diameter. This standard size allows for efficient drainage of water from the dishwasher during the wash and rinse cycles. The drain hose from the dishwasher is connected to the drain pump, which then leads the wastewater to the household's plumbing system or a dedicated dishwasher drain line.
It's essential to ensure that the dishwasher's drain hose is properly connected and secured to the drain pipe to prevent leaks and ensure smooth drainage. Additionally, the drain hose should have a high loop or an air gap to prevent backflow of water from the sink or garbage disposal into the dishwasher, which could lead to contamination or damage to the dishwasher.
While 3/4 inches is the typical size, it's always a good idea to verify the specific requirements for your dishwasher model by referring to the manufacturer's installation manual or guidelines. This ensures that you have the correct information for your particular appliance and plumbing setup.