You need the (or any expanding bladder bag). This is a $10 rubber nozzle that attaches to your garden hose.
Change your habits, buy a $10 Drain King, and run hot water through that pipe once a month. Your future self, standing in a dry laundry room on a Sunday night, will thank you. Have you pulled a "Flamingo Leg" out of your pipes? Tell us about the worst thing you’ve found in your drain hose in the comments below. washing machine drain clog
If you just snake the standpipe, you are pushing the clog deeper into the trap. You need to pull the auger back toward you to hook the sludge and yank it out. You will eventually get this clog again. Sludge is inevitable. But you can turn a "once a year emergency" into a "once every 5 years maintenance." You need the (or any expanding bladder bag)
Here is the trick 90% of DIYers get wrong: Your future self, standing in a dry laundry