Tru-Vac 22, the second most popular vacuum in our line-up of ultra-reliable utility room equipment. Similar to the Tru-Vac 12, with one exception… We gave it twice the power!! Nothing is left to chance during the manufacturing process of these state-of-the-art dry vacuums. From the German engineered motors with only one moving part, to the easy-to-replace 10-micron filter, located directly in the front of these units… Peace of mind is what you get with the purchase of every Sierra Dental Equipment vacuum system.