Why is my washer drain water coming back up?

Author: Tracy Treutel  |  Last update: Thursday, March 27, 2025

Washing machines overflow for a variety of reasons—the leading culprit, though, is a clog in the drain pipe. Lint and other debris come off of clothing during the wash cycle and are drained from the unit alongside the dirty water, potentially leading to clogs that can wreak havoc on your drain pipe.

Why does my washing machine drain keep backing up?

Regular blockages in a washing machine drain can be caused by several factors: Lint and Debris: Lint, hair, and small fabric pieces can accumulate in the drain hose or filter, leading to clogs. Detergent Buildup: Using too much detergent or the wrong type can create soap scum that builds up in the drain system.

Why is water coming back up in my washing machine?

There are a few reasons why water may be collecting under the wash drum, like a kinked or clogged drain hose or regularly overpacking your machine with laundry.

How do you fix a backed up washing machine drain?

Here are some steps you can take to clear a clogged washer drain:
  1. Turn off the power. Turn off the power to your washing machine by unplugging it or turning off the circuit breaker. ...
  2. Find the drain pipe. ...
  3. Check for blockages. ...
  4. Plumber's snake. ...
  5. Hot water and vinegar. ...
  6. Power on. ...
  7. Call a top rated plumber. ...
  8. Clean lint trap.

Why is my washer standpipe overflowing and not clogged?

A malfunctioning water level switch, which controls the amount of water entering the machine, can cause the appliance to overfill and lead to standpipe overflow. A faulty timer can cause the machine to continue filling with water even when it should have stopped, which can also cause overflow.

Washer drain backed up and overflowing

How do you unclog a washer standpipe?

Check for any visible debris or lint buildup in the drain pipe and remove it using a pair of pliers or a wire hanger. If the clog is still present, you may need to use a plumbing snake or auger to break it up. A plumbing snake is a long, flexible cable that can be inserted into the drain pipe to dislodge any blockages.

How do I know if my washing machine drain pump is clogged?

Usually, if the drain pump isn't working properly, you'll hear an unusual noise or notice leaking from the washing machine when it is running. If your pump is malfunctioning, you'll need to replace it yourself or call a professional to replace it for you.

Why is water coming up from the floor drain when I do laundry?

If the issue is with water coming up through the basement floor drain, the issue is not with a clog in the basement floor drain itself. Instead, it's most likely an issue with your home's main drain line that is causing the floor drain to back up. Like many of us, liquids like to take the path of least resistance.

Why is my washing machine drain backing up into the bathtub?

Sometimes, water might back up in the kitchen sink while you're doing a load of laundry, or your bathtub will fill with water. Either case means that your main drain line is clogged. You need to call a professional to clear the drain for you.

Why is my washing machine drain backing up into my kitchen sink?

If your kitchen sink is backing up when washing laundry you may have a clogged drain or a venting issue, but it could be other issues. Start to identify the problem and contact your local plumbing company for help. To start with, know that your sink and washing machine drain lines tend to run congruent to each other.

Why is my washing machine pouring water from the bottom?

A leaking washing machine is a common issue caused by factors like faulty drain pumps, damaged seals, or clogged hoses. To fix it, first, turn off the machine and inspect these components for wear or damage. Tighten or replace parts as needed. If the issue persists, professional repairs may be necessary.

How do I fix my washing machine water overflow?

In brief, the first step in resolving washer overflow problems is to inspect the water inlet valve for obstructions or flaws. Next, look for any damage or obstructions in the hose and water level pressure switch. Clean or replace these parts as needed.

Why is my washing machine backing up water?

Sometimes, water might back up in the kitchen sink while you're doing a load of laundry, or your bathtub will fill with water. Either case means that your main drain line is clogged. You need to call a professional to clear the drain for you.

How do I stop my drain from backing up?

If you do not have a backwater valve, plugs with backflow devices can be installed in floor drains. These plugs have a ball or float that will stop water or sewage from backing up into a home while permitting water to flow into the drain. These plugs can be left in place year-round.

Why is water coming back into my washing machine?

Why does my washer keep filling with water? If your washing machine water won't shut off, there are a few possible causes: A damaged water inlet valve. A broken water level switch.

How do I know if my washing machine filter is blocked?

Clothing That Feels Heavy After a Cycle: When your clothes are unusually damp even after a spin cycle, it's a sign that the machine isn't draining effectively, which usually points to the filter! Water Leakage: Unexpected puddles around your washing machine might indicate pressure buildup caused by a clogged filter.

Why is water coming up from my washing machine drain?

Washing machines overflow for a variety of reasons—the leading culprit, though, is a clog in the drain pipe. Lint and other debris come off of clothing during the wash cycle and are drained from the unit alongside the dirty water, potentially leading to clogs that can wreak havoc on your drain pipe.

Why is my laundry room drain backing up?

That can happen when: A sewer line has cracks or holes. A sewer line is bellied, sagging, or collapsed. Tree roots have misaligned or infiltrated the sewer line.

How do you unclog a washing machine floor drain?

Start by pouring a cup of baking soda down the drain, followed by a cup of vinegar. Let the mixture fizz for about 15 minutes before flushing it with hot water. Wire Hanger or Drain Snake: If the clog is deeper within the pipes, you can use a wire hanger or a drain snake to physically break up and remove the blockage.

How do I know if my washing machine waste pipe is blocked?

A common reason for a washing machine not draining is a blockage in the drain hose. This could be due to lint, debris, or even small items of clothing becoming lodged within the hose. To check for blockages, remove the drain hose from the drain outlet and visually inspect it.

Will a blocked filter stop a washing machine from draining?

The job of the washing machine filter is to prevent foreign objects from making their way to the washing machine pump and causing damage. However, if the filter isn't cleaned on a regular basis, it can become blocked, preventing the appliance from draining and other potential damage.

What happens if the washing machine drain is clogged?

As with any other pipe, laundry drains are sometimes prone to clogging and backing up. A clogged laundry drain can be a major issue as it could quickly flood the surrounding area before you even realize what is happening and potentially lead to extensive water damage.

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