Washing Machine Leaking? Find the Source and Stop It

A puddle around the washing machine sets off alarm bells, but most washer leaks come from a hose, a seal, or simple overflow — not a failed machine. The trick is to figure out where and when the water appears, because that points you almost straight to the cause.

First: when does it leak?

Run a cycle and watch closely. Note when the water shows up and where it comes from:

• During fill → suspect the supply hoses and their connections.
• During the wash → suspect the door seal (front-loaders) or an internal hose/tub.
• During spin or drain → suspect the drain hose or pump.
• Lots of suds with the water → it's oversudsing, not a true leak.

Lay down dry paper towels around and under the machine to spot the first drips.

The supply hoses (and why they matter most)

The two hoses feeding hot and cold water to the washer are under constant pressure — and aging rubber ones are a leading cause of major home flooding. Check:

• The hoses for bulges, cracks, or corrosion, especially near the fittings.
• The connections at both the wall valves and the machine — snug a loose one, or replace a worn rubber washer inside the coupling.

If yours are old rubber hoses, replace them with braided stainless steel — this is exactly the inspect washing-machine & toilet supply lines task, and these supply lines are some of the cheapest insurance against a burst-hose flood you can buy.

The door seal (front-loaders)

Front-loading washers seal against a flexible rubber door gasket that's a frequent leak source:

• Wipe the gasket and check the folds for trapped coins, hair clips, or debris that break the seal.
• Look for tears, cracks, or heavy mildew — a damaged gasket needs replacing.
• Run the tub-clean cycle periodically; built-up grime and biofilm degrade the seal and cause that musty front-loader smell.

Overloading and detergent

Two very common "leaks" aren't leaks at all:

• Overloading throws the drum off balance and lets water slosh past seals during the spin. Wash smaller, balanced loads.
• Too much detergent — or regular detergent in an HE machine — creates excess suds that overflow the tub and spill out. Use HE detergent in the right amount.

The drain side

If water appears during the drain or spin:

• Make sure the drain hose is secured into the standpipe and not loose enough to whip out under pressure.
• Check that the standpipe isn't clogged — a slow drain backs up and overflows. (Clearing slow drains before they fully clog is its own habit — see how to unclog a slow drain.)

Protect the floor while you diagnose

Until it's fixed, shut the washer's supply valves off between loads, and consider a drain pan under the machine — especially on an upper floor where a leak ruins the ceiling below. Knowing where your main water shutoff is makes any escalation faster; see how to shut off the water to your house.

When to call a pro

If the hoses, seal, and drain are all sound but it still leaks — especially from underneath during the wash — an internal hose, the tub seal, or the pump may have failed, which is an appliance-tech job. Weigh it against the machine's age with repair or replace. For the broader routine, see the plumbing system overview.

Make it automatic

Build your free Owner Tools plan and we'll remind you to inspect the washer's supply hoses every year and stay ahead of the slow drains and seals that cause leaks. No login, no address required.