Irene C Buellton , CA March 11, 2016 Appliance: General Electric Dishwasher GSD4260J00SS Ge Dishwasher Gsd4260j00ss: The water kept filtering back into the dishwasher and terrible smell. How to replace Flapper Check Valve. When my husband took apart, looked like the Piston Nut Assembly was melted. So we bought that, that wasn't it. Looked at video and they said it might be the Flapper check valve, we received that, hubby put it in and seems to be okay. Thank you, for your very fast service on your parts. Irene and Bud Covington Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes