Plumber Red Seal · Question
A domestic dishwasher must be connected to the drainage system via:
To prevent backflow of wastewater into the dishwasher, it must discharge through an air break. This is achieved with a dedicated air gap fitting or by connectin
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Question: A domestic dishwasher must be connected to the drainage system via:
Answer options:
- A direct connection to a wye fitting in the wall. ✅ An air gap fitting on the counter or connection to the sink tailpiece above the trap.
- A dedicated P-trap below the floor.
- A gravity-fed line directly to the building drain.
Correct answer: An air gap fitting on the counter or connection to the sink tailpiece above the trap.
Explanation: To prevent backflow of wastewater into the dishwasher, it must discharge through an air break. This is achieved with a dedicated air gap fitting or by connecting its drain hose to the kitchen sink tailpiece above the P-trap weir.
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