A Leaky Pipe When Running a Washing Machine

Standpipe

• The drain hose runs from the washing machine’s pump to the standpipe or drainpipe next to the washing machine. The standpipe removes water from the washing machine and transports it out your home’s main wastewater outlet. If the standpipe becomes clogged, it can leak water back into the washing machine while it’s running. Contact a plumber to inspect the standpipe for a blockage. Ask him to remove the clog and ensure the obstruction didn’t cause permanent damage to the standpipe or drain hose.

Drain Hose

• The drain hose that’s connected to the washing machine’s standpipe can leak residual water when the washer is draining. You'll need to stop the washing machine, and slide out the washer to view the drain hose. Inspect the hose for leaks, and replace it if you find that the hose is leaking.

Water Supply Hoses

• A washing machine commonly depends on two water supply hoses for water. One hose is connected to the hot water supply valve, and the other hose is connected to the cold water supply valve. Both hoses attach to the back of the washing machine. If one of the hoses becomes damaged, the hose is liable to leak water when the washing machine fills. When this happens, water will burst from the breach in the hose and pool around the washing machine. Turn off the cold and hot water valves on the wall behind the washing machine to stop a hose from leaking, and replace the leaky hose.

Considerations

• A washing machine can also leak from a water valve located inside the washer’s outer tub. Although the valve doesn’t supply water as a pipe does, the valve opens to allow water to fill the washtub. If your washing machine overfills with water when it’s running or never completely drains of water, a broken water valve might be leaking. Shut off the water inlet valves behind the washing machine to temporarily disconnect the washer’s main water supply. Contact a washing machine repair specialist familiar with your washing machine model to assess the water valve for potential leaks.