Bryant F Dayton , OH January 18, 2016 Appliance: Maytag Portable Dishwasher MDC4650AWW0 Maytag Dishwasher Mdc4650aww0: Coupler head damaged and needed replaced on portable dishwasher. How to replace Coupler & Hose Assembly (Faucet Connection). Coiupler and hose assembly replacement ordered and took approximately 30 minutes to R & R the parts. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes