This part stops water in the drain hose from flowing back into the tub. This part does NOT come with installation instructions. This original Samsung Dishwasher Check Valve originally shipped with the following Samsung devices: DMR78AHW/XAC, DMR57LFB, DMR57LFB/XAA, DMR57LFB/XAC This is a true Samsung part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!

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