Washing machines are not completely airtight, but they are designed to be water-tight during their regular operation. They have a door or lid that seals shut to prevent water from leaking out during the wash and spin cycles. The rubber gasket or door seal around the opening helps create a watertight seal when the door is closed properly.
However, washing machines do have some small vents or openings to allow air circulation and prevent the buildup of unwanted odors and moisture inside the machine. These vents are usually located at the back or near the top of the machine. They are designed to allow a minimal amount of air to flow in and out.
It's important to note that while washing machines are designed to be water-tight, they are not meant to be completely airtight or airtight enough for vacuum sealing. Attempting to completely seal a washing machine could lead to operational issues and potentially damage the machine due to the pressure differences that can occur during cycles.
If you are experiencing water leaks during washing, make sure the door or lid is closed properly, and check the condition of the rubber gasket or door seal for any damages or debris that might be preventing a proper seal. Always follow the manufacturer's instructions for using and maintaining your washing machine to ensure its optimal performance and longevity.