BWT Bestflush Ventilation Valve is highly recommended with BWT Bestmax XL and BWT Bestmax 2XL. As a result, it makes flushing of your new cartridge easier and simpler.
Depending on which filter is fitted, will depend on how many litres of water need to be flushed before the filter is at its optimum. In order to activate, firmly press the top button.
Browse our catalogue page for more BWT products such as water filters.