Most Likely Causes (Ranked)
The drain pump is at the bottom of the machine and handles high volumes of water under pressure during drain and spin cycles. The pump shaft seal wears from debris (coins, buttons, underwire, lint) and normal use. When the seal fails, water leaks from the pump body during drain and spin cycles. The pump bearing may also fail, causing the shaft to wobble and destroy the seal.
The large rubber hose connecting the outer tub to the drain pump deteriorates from detergent chemicals, hot water, and debris. Spring clamps on these hoses loosen from vibration. A crack or loose clamp causes water to leak during wash, drain, and spin cycles — essentially any time water moves through the system.
Front-load washers have a tub seal (also called a shaft seal) where the drum shaft passes through the rear tub. This seal keeps water inside the tub. When it fails, water leaks down the back of the tub to the bottom. Bearing failure usually accompanies seal failure — you'll hear a rumbling noise during spin before seeing a leak.
Plastic outer tubs can crack from overloading, foreign objects, or stress from a failing bearing. Top-load washers with a transmission (older models) can develop tub seal leaks where the transmission shaft enters the tub. A cracked tub leaks at any water level.
Internal hoses from the water inlet valves to the tub dispenser can loosen or crack. These are different from the external supply hoses — they're inside the machine, connecting the valves to the detergent dispenser or tub fill port. Clamps loosen from vibration.
How to Fix It
Replace the Drain Pump
$25-60 DIY / $200-400 Pro- 1Unplug the machine. Remove the front lower panel (usually 2-3 screws).
- 2Disconnect the pump hoses (have towels ready — water will drain from the hoses).
- 3Disconnect the electrical connector. Remove the pump mounting screws (usually 2-3).
- 4Install the new pump (match your model number). Reconnect hoses with new spring clamps if available.
- 5Run a test cycle and check for leaks.
Replace Internal Hoses and Clamps
$10-30 DIY- 1Unplug the machine. Open the cabinet (top-load: remove the back panel; front-load: remove the front panel).
- 2Inspect all rubber hoses for cracks, swelling, or hardness. Check all spring clamps for tightness.
- 3Replace damaged hoses ($5-15 each). Replace spring clamps with worm-gear clamps ($1-2 each) for a tighter seal.
- 4Reconnect and run a test cycle.
Replace Tub Seal and Bearing (Front-Load)
$100-200 parts DIY / $350-600 Pro- 1This is an advanced repair — the entire drum and spider assembly must be removed.
- 2You'll need the specific bearing and seal kit for your model (Samsung, LG, Whirlpool, etc.).
- 3The outer tub is split in half to access the bearing pressed into the rear tub.
- 4Budget 3-5 hours for a first-time DIY. YouTube has model-specific tutorials.
- 5If the spider arm (the aluminum piece connecting the drum to the shaft) is corroded through, the repair cost approaches a new machine — inspect before ordering parts.
When to Call a Professional
A washer leaking from the bottom during spin can spray water a surprising distance. Run the test cycle with towels on the floor.
If the tub bearing and seal have failed (rumbling during spin), continuing to run the machine will destroy the outer tub — making a $200 repair into a $500+ repair or replacement.
Front-load washer tub seal/bearing replacement is a major repair. Get a repair estimate before ordering parts — if the machine is 8+ years old, replacement may make more sense.
How to Prevent It
Empty pockets before every load — coins, bobby pins, and underwire destroy pump seals.
Don't overload the machine — it stresses bearings, seals, and hoses.
Use HE (high-efficiency) detergent in front-load washers — regular detergent creates excess suds that stress seals.
Replace internal hoses and clamps every 8-10 years as preventive maintenance during any internal service.
Frequently Asked Questions
Pump leak: water during drain/spin only, possibly with grinding noise. Tub seal: water during all cycles, rumbling noise during spin, rust stains on clothes.
If it's a pump ($25-60 DIY): repair. If it's tub seal + bearing ($350-600 pro): probably replace unless it's a premium machine. Average washer lifespan is 10-14 years.
Not recommended. The leak will worsen, and water + electricity is a shock hazard. Also, water damage to your floor accumulates with every use.