What is a drain hose for a washer?

A drain hose for a washer is typically a pre-installed attachment on a washing machine that is used to connect its drain opening to a wastewater drain. Improperly fitted drain hoses can result in issues, such as excessive water siphoning down the drain and a flood occurring in the room.

When installing a drain hose to a water supply and drainage system, one should make sure the lip of the connecting sink or stand pipe is at least 30 inches above the floor. If a drain hose is connected to a standpipe, it is not recommended that they are sealed together, as an air gap is necessary to avoid water being siphoned out of the washing machine.