Best Wet Dry Vacuums: Top Shop Vac and Floor Washer Picks for Wet and Dry Messes

The best wet dry vacuum is the one that matches your mess, not the one with the biggest peak HP number on the box. Our picks run from a versatile DEWALT 6 gallon shop vac to a compact Armor All for the car, a stainless Amazon Basics tank, a 16 gallon Craftsman for big jobs, and two cordless and corded floor washers for sealed hard floors. Everything here is chosen from real units and framed with honest pros and cons so you can match the vac to the job rather than the spec sheet.

Tank size and how you will use it

Tank size is the first thing to settle, because it decides how often you stop to empty and how easy the vac is to move and store. A small 1.5 gallon unit like the Armor All, or the 2.5 gallon Craftsman, is light to carry to a car interior or a quick spill, but it fills fast. A 4 to 6 gallon tank such as the stainless Amazon Basics or our top DEWALT DXV06P is the sweet spot for most home and garage work, holding enough to be useful while staying easy to handle. The 16 gallon Craftsman sits at the other end for flooded basements and workshop sawdust, where a small tank would have you emptying it every few minutes, at the cost of weight and storage space. Floor washers like the Tineco iFLOOR 5 and the Bissell CrossWave use small clean and dirty water tanks instead, because they are washing floors rather than hauling debris.

Peak HP versus real suction

Shop vacs are sold on peak HP, and it is the number buyers trust most and should trust least on its own. Peak HP is measured at the motor for a split second in the lab, not the steady pulling power you feel through the hose, so a 6.5 peak HP rating like the big Craftsman does not mean it out-cleans a well-sealed smaller vac at every task. What actually moves dust and water is the combination of motor, hose diameter, filter condition, how full the tank is and how well the whole unit seals. Use peak HP to compare vacs of a similar size, as we have done across the Armor All, Craftsman and DEWALT picks, but weigh it alongside tank size and the attachments rather than chasing the highest figure.

Wet pickup and draining

The wet half of a wet dry vac is what sets it apart, and it works a little differently from dry vacuuming. To pick up liquid you usually take out the pleated dust filter and fit the foam sleeve or wet filter the maker supplies, then vacuum the water straight into the tank; the shop picks here, from the DEWALT to the Craftsman and Amazon Basics, are all built for this. Emptying is the part people underestimate: several gallons of water get heavy, so a drain plug or low port near the base, common on larger shop vacs, saves you hoisting the whole tank. Always empty, rinse and air-dry the tank and filter after a wet job so the inside does not stay damp and start to smell. The floor washers handle dirty water in a separate tank you tip out and rinse instead.

Filters and attachments

Filters and attachments decide how well a vac copes with different messes and how cheap it is to keep running. Most shop vacs ship with a pleated cartridge filter for fine dry dust and a foam sleeve or wet filter for liquids, so check that both are included and that replacement filters are easy to find, since the filter is the part you replace most. On the nozzle side, a wide floor tool covers open areas, a crevice tool reaches corners and car seats, and a blower function like the one on the DEWALT DXV06P doubles the machine as a leaf and sawdust clearer. Floor washers work differently again: the Tineco iFLOOR 5 and Bissell CrossWave rely on a brush roll and a self-cleaning or rinse cycle, so the upkeep is rinsing the roller and tanks rather than swapping filters.