Quieter than expected!
Simple and straightforward installation. Supplied with an electrical isolated air switch for ultimate safety. The air switch fits in the blank tap hole if your sink has two tap holes to cope with left/right insolation.
Much quieter than my previous WDU. A budget Chinese made unit from a Swiss manufacturer, however it appears to be manufactured to the expected high standards you would expect of Swiss companies.
Verified purchase: YesCondition: New