Customer Questions and Answers for Flapper Valve (Drain Check) by Frigidaire

This flapper valve is the dishwasher's one-way drain check. It directs wastewater out and helps prevent backflow into the tub, promoting complete draining and reducing standing water, odors, and water returning after the drain cycle.

• Maintains one-way water flow from the sump/pump to the drain hose
• Helps prevent backflow from the sink or air gap into the dishwasher tub
• Wear, warping, or sticking can lead to slow draining or water left in the tub
• May also present as water backing into the tub after a cycle or intermittent drain faults

• Disconnect power and turn off water supply before servicing
• Access the valve at the drain outlet/pump area; note hose and clamp orientation
• Match the original valve orientation; the flapper should open toward the drain hose (direction of flow)
• After reassembly, run a short fill-and-drain test and inspect for leaks and proper draining