Mike L Lebanon , OH April 13, 2020 Appliance: LG Dishwasher LDF7551ST Lg Dishwasher Ldf7551st: Drain pump on my lg dishwasher went out. How to replace Dishwasher Check Valve. I replaced the pump and backflush valve. I was able to replace both by just removing the kick plate and pulling out the dishwasher a little from under the counter so I could tilt the front end up and access the clamps better. Just two hoses and one electric connector. Be sure to have a large towel to soak up the water from inside the hoses. 9 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes