Your washing machine has a lint filter, but it sucks. You can buy an inline nylon mesh filter that attaches to the end of your grey drain hose. Check it after every 5 loads. You will be horrified (and relieved) by what it catches.
You need the (or any expanding bladder bag). This is a $10 rubber nozzle that attaches to your garden hose. washing machine drain clog
But before you call the plumber (and pay weekend rates), let’s take a deep breath. This is one of the most common, and surprisingly fixable, plumbing emergencies in the home. Here is everything you need to know about why this happens, how to fix it, and how to ensure it never ruins your evening again. When water doesn’t drain, most people’s first instinct is to blame the machine. They assume the pump is dead. In 80% of cases, that is wrong. Your washing machine has a lint filter, but it sucks
No, not literally. But you have to remove the washing machine standpipe trap. Usually, there is a cleanout plug just above the trap. Remove that plug (have a bucket ready). Go in with the auger downstream toward the main line, not upstream toward the washer. You will be horrified (and relieved) by what it catches
Think of a straw in a milkshake. If the straw is clear, you suck easily. If the bottom is clogged with a chunk of strawberry, you get nothing. Your washer pump is the same. It’s trying, but the pipe is blocked. If you were to look inside your clogged drain pipe, you wouldn’t just see water. You would see something plumbers call "P-trap sludge."
But don't buy the name brand. Use Citric Acid (the stuff for canning tomatoes). Run an empty hot cycle with 2 tablespoons of citric acid. It dissolves detergent scum better than bleach.
You are dealing with soft sludge, not tree roots. A snake will poke a hole through the sludge, but it won't clear the walls. The water will drain for a week, then clog again.