If your washing machine is not making any noise when it drains, it could be due to several reasons:
Noise insulation: Modern washing machines are designed with noise insulation materials to minimize operational noise, including noise generated during the draining process. These insulation materials help absorb and reduce vibrations and sound, making the machine quieter overall.
Proper installation: Proper installation of the washing machine can contribute to reduced noise during draining. If the machine is installed on a stable and level surface, it is less likely to vibrate or produce excessive noise while draining.
Anti-vibration features: Many washing machines have built-in anti-vibration features. These features include rubber pads or suspension systems that help absorb vibrations and reduce noise during the spinning and draining cycles.
Well-maintained drain system: If the washing machine's drain system is well-maintained and free from blockages or restrictions, it is likely to operate smoothly and quietly during the draining process. Regular cleaning and maintenance of the drain system can help ensure proper water flow and reduce noise.
Type of drain system: The type of drain system used can also affect the noise level during draining. Some modern washing machines have quieter drain pumps or use gravity-based drainage systems, which tend to be quieter compared to older models.
It's important to note that while it is normal for a washing machine to make some noise during its operation, excessive noise or sudden changes in noise level could indicate a problem. If you notice any unusual noises or changes in your washing machine's behavior, it's advisable to consult the manufacturer's instructions or contact a professional for further inspection and potential repairs.