How to Stop Pet Hair Clogging Your Washing Machine Filter

Quick Answer

Pet hair bypasses the wash cycle, accumulates in the drain filter and pump housing, and eventually blocks drainage completely. Preventing blockages takes three things: pre-wash preparation of pet items, regular filter cleaning (fortnightly for pet owners), and a monthly enzyme maintenance wash to dissolve what builds up inside the drum, seals, and plumbing.

Where Pet Hair Gets Trapped in Your Washing Machine

Your washing machine's lint filter catches some pet hair, but not all of it. The rest ends up in places you can't see without pulling the machine apart.

The drain filter

On front loaders, the drain filter sits behind a small panel at the bottom front of the machine. On top loaders, it's usually inside the drum or near the agitator. Pet hair collects here in dense clumps, mixed with lint and tissue remnants. Left unchecked, it forms a plug that restricts water flow.

The drain pump

Hair that passes through the filter reaches the drain pump impeller. Fine dog and cat hair wraps around the impeller blades, reducing pump efficiency. Over time, the pump works harder to drain water, which shortens its lifespan and can trigger error codes.

The drain hose

Pet hair sticks to the ridged interior walls of the drain hose and accumulates at bends. Partial blockages here cause slow drainage long before you see standing water in the drum.

The rubber door seal

Front-loading machines have a rubber gasket around the door opening. The folds in this seal trap wet pet hair, lint, and moisture, creating a breeding ground for mould and bacteria. This is often the source of that musty smell pet owners notice on freshly washed clothes.

Signs Your Filter Is Clogged with Pet Hair

A clogged filter doesn't always announce itself with an error code. Often, the signs are gradual enough that you adjust without realising the machine is struggling.

• Slow drainage: The spin cycle takes longer than usual, or you hear extended pumping sounds at the end of a wash.
• Standing water: You open the door and find water pooled in the drum.
• Error codes: Most modern machines display a drainage error (E21 on Bosch, F21 on Whirlpool, E2 on Samsung). Check your manual for your model.
• Musty smell: Trapped hair and moisture in the filter area produce a damp odour that transfers to your laundry.
• Hair on clothes after washing: If pet hair is redistributing onto clean laundry, the machine isn't flushing it away properly.

If you're finding pet hair on clothes after every wash, our complete guide to removing pet hair from your washing machine covers the full machine clean.

How to Clean a Washing Machine Filter: Step by Step

Cleaning the drain filter is straightforward, but it's messy if you don't prepare. Set aside ten minutes and grab some old towels.

Front-loading machines

1. Locate the filter panel. Bottom front of the machine, usually on the right. You may need a flat-head screwdriver or coin to pop it open.
2. Prepare for water. Place a shallow dish or baking tray under the panel. Expect residual water, sometimes up to 500ml.
3. Drain slowly. Most machines have a small drain tube next to the filter cap. Pull it out, remove the plug, and let the water drain before unscrewing the filter.
4. Remove the filter. Turn it anti-clockwise and pull gently. Expect a clump of hair, lint, and debris.
5. Clean the filter. Remove debris by hand, then rinse under warm running water. Use an old toothbrush to clear hair from the mesh.
6. Check the cavity. Shine a torch into the housing. Look for hair wrapped around the pump impeller and remove it with tweezers.
7. Refit the filter. Screw it back clockwise until snug. Replace the drain tube plug and close the panel.
8. Run a short rinse cycle and check for leaks around the filter panel.

Top-loading machines

Top loaders vary more in filter design. Some have a removable lint filter on the drum rim or attached to the agitator. Others use a self-cleaning filter in the drain system. Check your manual for the exact location. The cleaning process is the same: remove, clear debris, rinse, refit.

For a broader maintenance routine including descaling and seal cleaning, see our washing machine maintenance schedule.

How to Prevent Pet Hair Clogging Your Filter

Cleaning the filter deals with what's already there. Prevention reduces how much hair reaches the filter in the first place.

Shake and brush items before loading

Take pet beds, blankets, and throws outside and give them a firm shake. For heavily furred items, run a rubber glove over the surface first. Two minutes of prep saves you a filter clean.

Use a mesh laundry bag

Place pet-hair-heavy items inside a mesh bag before adding them to the drum. The bag catches loose hair during the wash cycle, keeping it out of the drainage system. After washing, turn the bag inside out, remove the hair, and bin it.

Wash pet items separately on a shorter cycle

Don't mix pet bedding with your regular laundry. Wash pet items in their own load at 30°C or 40°C. Shorter cycles mean less time for hair to work its way into seals and plumbing. Running a quick rinse afterwards (empty drum) flushes stray hair before your next load.

Clean the filter fortnightly

If you wash pet items once a week, clean the filter every two weeks rather than monthly. This prevents hair from compacting into a solid mass that restricts flow. Five minutes, once you know where the filter is.

Run a monthly enzyme maintenance wash

Pet hair doesn't just sit in the filter. Skin oils, saliva residue, and dander coat the drum, door seal, and plumbing. These deposits trap more hair and feed odour-causing bacteria. A monthly hot wash (60°C or above) with an enzyme-based cleaner breaks them down and reduces hair adhesion.

What NOT to Do

Don't overload the drum

Cramming pet bedding into a full load reduces water circulation. Hair can't be rinsed away effectively, so more settles in the seals and drain. Keep pet loads to half or two-thirds drum capacity.

Don't skip the filter clean

Unlike lint that gradually breaks down, animal hair resists decomposition. It accumulates until something fails. A blocked pump is a repair bill; a filter clean is free.

Don't pour drain unblocker into your machine

Chemical drain unblockers are designed for sink and bath pipes. They can damage rubber seals, corrode internal parts, and leave residue on your laundry. If the filter clean doesn't fix drainage, the blockage needs professional attention.

Don't ignore the door seal

Pull back each fold of the rubber gasket and remove trapped hair and debris. Build-up here causes odours and can prevent the door from sealing properly.

When to Call a Repair Engineer

Most pet hair blockages are fixable at home. But call an engineer if:

• The pump makes a grinding or clicking noise during the drain cycle, even after you've cleaned the filter. Hair may be wrapped deep inside the pump mechanism.
• Water won't drain at all and the filter is clear. The blockage is likely in the drain hose or internal plumbing.
• An error code persists after you've cleaned the filter and run a test cycle.
• There's a burning smell during the drain cycle. This suggests the pump motor is overheating from an internal blockage.

The Which? guide to cleaning a washing machine covers additional manufacturer-specific advice.

Maintenance Schedule for Pet Owners

For load sizes, temperatures, and drying tips specific to pet bedding, our guide to washing dog beds without clogging your machine has the full breakdown.

Frequently Asked Questions

How often should I clean my washing machine filter if I have pets?

Every two weeks if you wash pet items weekly. If you're washing pet bedding more than once a week, check the filter weekly. It takes five minutes and prevents compacted blockages that stress the pump.

Can pet hair damage my washing machine?

Yes. Hair wrapping around the pump impeller forces the motor to work harder, which can cause overheating and premature failure. Long-term neglect can lead to pump replacement, typically costing £100–£200 for parts and labour.

Do pet hair catcher balls work?

Reusable laundry balls with a textured surface catch some loose hair during the cycle. They reduce the amount reaching the filter but aren't a complete solution. Clean them after every wash for best results.

Should I tumble dry before washing to remove pet hair?

Running pet items through a short, no-heat tumble cycle before washing loosens hair so the dryer's lint trap catches it instead of your washing machine filter. Effective for heavy shedders. Clean the dryer lint trap immediately afterwards.

Why does pet hair stick to clothes even after washing?

A partially blocked filter means the machine can't flush hair during rinse and drain cycles, so it redistributes onto other items. Pet hair also carries a static charge that makes it cling to synthetic fabrics. Reducing load size and using white vinegar in the fabric softener compartment helps reduce static.

Are washing machines with pet hair programmes worth it?

Machines from Samsung, LG, and Bosch with pet hair or allergy cycles add extra rinses and adjust drum speed to flush out hair. They help, but they're not a substitute for filter maintenance and pre-wash prep. A useful feature if you're buying new, but not a standalone fix.

Can I use bleach to clean the filter area?

A dilute bleach solution (one part to ten parts water) is safe for occasional use on the filter housing. But bleach doesn't dissolve pet hair or break down the oils and dander that cause build-up. Enzyme-based cleaners are more effective for routine maintenance.