Checking the Drain Loop Height
How to Check the Drain Loop on a Whirlpool Dishwasher
Your dishwasher may be siphoning. Make sure to connect drain hose to waste tee or disposer inlet above drain trap in house plumbing and 20" (50.8 cm) minimum above the floor.
Make sure to use an air gap if the drain hose is connected to house plumbing lower than 20" (50.8 cm) above subfloor or floor.
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