Nothing moves powders faster than a vacuum. Fertliser, lime, sawdust... you name it it's all suckable! When you do you dont want that dust getting into your valuable vacuum pump. This is where this amazing dustcollecter fits in. It's self reverse pulsing off the truck air auxillary enabling it to keep itself free flowing. The filters are easily removable and washable as well if required. It has an easy access door for emptying at the end of the job. If it's dusty vacuuming... then you should consider one of these... your pump will thank you!