Samsung dishwasher water supply requirements

A Samsung dishwasher installed in a kitchen

Before you install, or even buy your dishwasher, make sure the water supply in your home meets the requirements for water temperature, water pressure, and hardware for proper connections. The dishwasher's main method of cleaning your dishes is completely based on the water temperature and pressure, so if they don't meet requirements, you won't get the cleaning performance you expect. Check out what the requirements are for your dishwasher's water supply.

Caution: To avoid severe burns, the water temperature should not exceed 149 degrees Fahrenheit.


It’s important that you review a few requirements before purchasing and installing your dishwasher, such as the water temperature and water pressure.

  • Water temperature: A hot water supply of 120 - 149 degrees Fahrenheit is required for the best cleaning and drying performance. If the water temperature is not consistent, you may experience error codes or blinking lights on your dishwasher.

  • Water pressure: The water supply pressure must be between 20 and 120 psi (pounds per square inch).

    Note: Water pressure less than 20 psi will cause water supply valve failure and prevent the water supply valve from shutting off.

  • Elbow: A 90-degree elbow is not included with the dishwasher but can be purchased. It is required to connect the water line to the dishwasher. The elbow is 1/2-inch NPT (National Pipe Thread Taper) on one end, and 3/8-inch compression fitting on the other end.

    90 Degree Elbow 1/2 NPT and 3/8 inch compression fitting
  • Supply line: The supply line is not included with the dishwasher but can be purchased. Most plumbing supply stores sell water supply lines of various lengths up to 10 feet long. A stainless steel supply line is recommended. If there is an issue with your supply line, you may experience error codes or blinking lights on your dishwasher.

    Supply Line

Tips for reducing leaks and water damage

After installing your dishwasher, there are a few things you can do to reduce the risk of leaks and water damage.

  • Make the water supply shut-off valve easily accessible.

  • Shut off the valve when the dishwasher is not going to be used for a week or longer.

  • Frequently check for leaks where the hose connects to the water supply shut-off valve.

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