Pat K Bend , OR October 10, 2021 Appliance: Whirlpool Washer GHW9400PW1 Whirlpool Washer Ghw9400pw1: Tune up time. How to replace Drain Hose (Outer). I have just been working on the movable parts that had worn out over time. Kind of a preventative maintenance thing. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes