Steven G Lodi , CA January 07, 2017 Appliance: Samsung Washer WF448AAW/XAA Samsung Washer Wf448aaw/Xaa / : Washer would not drain wash/rinse water. How to replace Washer Drain Pump. I replaced the drain pump, which was indicated as a likely source of the problem on U-Tube and APP installation videos. After diagnosis, part arrived from APP quickly; installation was about a 2 1/2 hour job (would go much quicker if I had to do it again); part fit perfectly; and most importantly fixed the problem! Do-It-Yourself Rating: Repair Time Estimate: 2+ hours