Best Wet/Dry Shop Vacs for Leaks, Basements, and Cleanup (2026)

Sooner or later every house puts water where it shouldn't be: a supply line under the sink, a water heater weeping onto the basement floor, a washer hose, a window well after a storm. Towels handle a cup. A wet/dry vac handles the rest, and between leaks it cleans the garage, the car, and the sawdust from your first project.

This guide covers what the numbers on the box mean, how big a tank to buy, which filter to use for water and for dust, and the safety rules for water and electricity, then compares four vacs from Craftsman, Shop-Vac, and Milwaukee. If water is coming in right now, stop it first: our burst pipe guide covers the shutoff and the electrical hazards.

What the Numbers on the Box Mean

Gallons is the drum's volume, not what it holds. Craftsman's fine print says collection capacity depends on the debris, the filter, and other factors, and on wet jobs the float stops suction before the drum is full.

Peak horsepower is the headline number and the least useful. Craftsman defines it as a level at or below the motor's maximum output, measured in a laboratory on a dynamometer. That describes the motor on a test stand, not what happens at the end of your hose.

Airflow and water lift describe suction. Shop-Vac defines airflow (CFM) as the most air the vac moves through the largest opening, which matters most for light debris like dust and wood chips, and water lift (sealed pressure) as how many inches it could pull a solid column of water straight up; above 75 inches is the high end for utility vacs. Not every maker publishes these, but when two vacs list them, compare those instead of horsepower.

What Actually Matters When You Choose One

Tank size, weight, and where it lives

A big tank means fewer trips to empty it; a small one takes less room, as Shop-Vac's advice puts it. For most houses, 9 to 12 gallons covers the basement and garage, and 2 to 2.5 gallons suits spills and tight storage. Water weighs a little over 8 pounds a gallon, so a few gallons outweigh the vac; Craftsman's manual says to drain or scoop some out before lifting. A big drum on casters is easy in a garage and miserable on basement stairs.

Filters: one for water, another for fine dust

Most vacs ship with a pleated paper cartridge for dry debris and small amounts of liquid. For real water pickup, follow your manual, and let a wet filter dry completely before vacuuming dust, which clogs it fast:

• Craftsman: the filter can stay in for small amounts of liquid, but remove it for large amounts or it saturates and mists out the exhaust. Craftsman sells a washable wet-application filter.
• Shop-Vac: remove all dry-use filters and bags, and use a foam sleeve for large quantities; Shop-Vac calls foam the ideal wet filter.
• Milwaukee: the cordless vac below uses its cartridge filter for both wet and dry pickup.

Fine dust needs its own filter. Craftsman says drywall dust and cold fireplace ash pass through a standard filter and blow back into the room, and Shop-Vac requires a high-efficiency filter bag for plaster, drywall, cold ash, and concrete dust. Read "HEPA" carefully: Craftsman's HEPA media cartridge uses HEPA-rated material but, in Craftsman's words, does not meet EPA or RRP guidelines for certified HEPA filtration.

A drain port, or a pump

For a lot of water, Shop-Vac says to get a tank drain, which empties into a floor drain without lifting the vac. Small vacs usually have none. A pump vac pushes water out through a garden hose while you keep vacuuming.

Hose diameter and length

Shop-Vac recommends a 2-1/2-inch hose for large debris, because a narrow hose clogs and loses suction. Compact vacs use 1-1/4-inch hoses, fine for spills and crevices. Check the cord, too: the corded picks below have roughly 10 to 12 feet.

The float that stops wet pickup

A float inside the filter cage rises with the water and blocks the motor intake. Craftsman and Milwaukee describe the signs: suction stops and the motor pitch rises. Turn the vac off, unplug it, and empty it; Milwaukee warns that running on with the float up causes extensive motor damage, and that a vac tipped over can lose suction the same way. Never vacuum water without the cage and float in place.

Corded or cordless

Corded vacs run as long as you need and come bigger. Cordless vacs keep the cord out of the water, but Milwaukee rates its 2-gallon M18 vac at 30-plus minutes on its HIGH DEMAND 9.0 battery: enough for a spill, not a wet basement.

Safety: Water, Electricity, and What Not to Vacuum

These rules come from the Craftsman, Shop-Vac, and Milwaukee manuals and from the CDC, EPA, CPSC, and OSHA.

Never vacuum anything flammable, burning, or hot

Sparks inside the motor can ignite vapors. All three manuals forbid gasoline and other flammable or combustible liquids, and Craftsman adds lighter fluid, solvent-type cleaners, oil-based paints, alcohol, and aerosol sprays, and says not to run the vac where those vapors may be present. Milwaukee says to keep its vac 30 feet from places where paint thinners, cleaners, or solvents are stored. No cigarettes, matches, or hot ashes. Shop-Vac also rules out hot materials, and water from a leaking water heater can scald: shut the heater off first, as our water heater leak guide explains, and let the water cool. Craftsman warns that sawdust or rags with stain or polyurethane can self-heat in the drum, so empty it after every use.

GFCI outlet, dry plug, dry hands

Plug a corded vac into a GFCI-protected outlet. The CPSC says GFCIs can prevent electrocutions, and the current National Electrical Code requires them in garages, basements, and laundry areas, among other places. Test them monthly. Keep the plug and cord out of the water and don't touch the plug, switch, or vac with wet hands. For an extension cord, Craftsman specifies an outdoor-rated cord in good condition, no smaller than 16-gauge, and Craftsman and Shop-Vac both say to keep the connection out of the liquid. Milwaukee adds rubber boots for wet pickup.

Sewage and floodwater are not a shop vac job

A backed-up floor drain, a toilet overflow with waste in it, or floodwater from outside is different from a clean supply-line leak. The CDC warns floodwater can carry sewage, chemicals, and sharp debris, and the EPA says damage from sewage or other contaminated water calls for a professional experienced in contaminated-water cleanup. If you must enter floodwater, the CDC says to wear rubber boots, rubber gloves, and goggles.

Drywall, concrete, and lead dust

Use the right filter, a dust mask, and eye protection; all three manuals call for safety glasses or goggles. Milwaukee's manual lists crystalline silica from brick, cement, and masonry among construction dusts linked to cancer, and OSHA's silica rule for construction crews calls for HEPA-filtered vacuuming or wet methods instead of dry sweeping. Shop-Vac's manual says not to vacuum lead paint debris, because it may spread fine lead particles into the air, or asbestos and other hazardous materials.

Unplug before you open it

Craftsman says to unplug before changing or cleaning a filter, Shop-Vac before removing the tank cover, and Milwaukee says to pull the battery before removing the motor housing. Don't leave a running vac unattended, and store it indoors, empty and clean.

At a Glance

Picks Worth Buying

1. Best overall — the 9-gallon all-rounder

Nine gallons suits most houses: big enough for a basement seep or a leak under the sink, and at 15.5 pounds light enough to carry upstairs. It has an oversized drain, a rear blower port, casters, and onboard storage for the 1-7/8-inch by 7-foot locking hose, two wands, and utility, car, and wet nozzles. It ships with a pleated paper filter and a dust bag, takes Craftsman's wet-application and HEPA-media filters, and has a 3-year limited warranty. Pros: manageable size and weight, a real drain, a complete tool set. Cons: the 1-7/8-inch hose clogs sooner on big debris than a 2-1/2-inch one, the cord is only about 10 feet, and there's no wet filter in the box. Best for: a first shop vac that handles a leak, the garage, and the car.

2. Best for basement water — the pump vac

On a big water job, the slow part is emptying the tank. Shop-Vac's Pump Vac sends water through a standard garden hose to a floor drain, utility sink, or other suitable drain, starting once about 4 inches is in the tank. The manual notes it picks up faster than it pumps, so the tank can still fill and trip the float; you hold the switch on for 10 to 15 seconds while the pump catches up. It also has a tank drain, a 2-1/2-inch by 8-foot locking hose, two wands, a floor nozzle, a 12-foot cord, a foam sleeve for water, and a cartridge filter and bag for dry work. Pros: little tank lifting, a wide hose, wet and dry filters included. Cons: more setup (the pump pickup and wet elbow go on and the cartridge filter comes off), no garden hose included, and the manual says it is not a sump pump and must not run unattended. If water arrives with every storm, see our sump pump guide. Best for: basements and utility rooms where one leak is more than one tank.

3. Best compact — the grab-and-go 2.5 gallon

A vac you can grab with one hand gets used more. Craftsman's 2.5-gallon unit weighs 6.7 pounds and suits spills, the car, and the lint at both ends of the duct when you clean the dryer vent. Craftsman describes it for light wet or dry vacuuming: take the filter bag off for water, and the float cuts suction when the drum is full. It comes with a 1-1/4-inch by 5-foot hose, a crevice tool, and a utility nozzle, doubles as a blower, and has a 3-year limited warranty. Pros: light, small, easy to store. Cons: the narrow 5-foot hose clogs on large debris, there's no drain, the included filter bag is for dry pickup only, and 2.5 gallons fills fast on a real leak. Best for: small spills, the car, and houses with little storage.

4. Best cordless — no cord near the water

A cordless vac keeps the plug away from the water and needs no outlet in a crawl space. Milwaukee publishes its suction numbers, 45 CFM of airflow and 32 inches of water lift, and includes a certified HEPA filter that its manual says to use for both wet and dry pickup. It has a 1-1/4-inch by 6-foot hose, a crevice tool, a utility nozzle, onboard storage, and a blower port, with 30-plus minutes of runtime on a HIGH DEMAND 9.0 battery. Pros: no cord in the water, HEPA filtration for fine dust, published airflow and water lift. Cons: it's a bare tool, so the battery and charger are extra unless you own M18 gear; 2 gallons and about half an hour limit it to spills and small leaks; and with no drain, you lift off the motor head and pour. Best for: M18 owners, crawl spaces, and cleanups far from an outlet.

How We Chose

We compare the category first — what a first-time homeowner actually needs from a wet/dry vac — then weigh manufacturer specifications, verified buyer feedback, and how the product type is used in real homes. We don't accept free products or payment for placement, and every pick names its compromise. How we research and review.

Frequently Asked Questions

Can I use a shop vac on a flooded basement?

Only if the water is clean (a supply line, or a water heater that is off and has cooled), you can work from dry floor rather than standing in the water, no outlets, cords, or panel are in or near it unless the power there is off, and the area is small. Sewage, floodwater from outside, water across a whole floor, or soaked drywall and carpet call for a water-removal company. If the basement takes on water every storm, start with why the sump pump runs constantly or can't keep up.

Do I need to remove the filter to vacuum water?

It depends on the vac. Craftsman lets you leave it in for small amounts and recommends removing it for large ones, Shop-Vac says to swap to a foam sleeve, and Milwaukee's cordless keeps the same cartridge for wet and dry. Either way, dry the filter completely before vacuuming dust again.

How do I clean a shop vac after picking up water?

Empty it right away; Shop-Vac says never to let liquid sit in the tank. Wash the drum with warm water and mild soap. After dirty-water pickup, Craftsman recommends disinfecting the drum with 1 gallon of water and 1 teaspoon of chlorine bleach for 20 minutes, swishing now and then, then rinsing until the bleach smell is gone. Dry the drum and filters completely to prevent mildew, and store the vac indoors.

The Bottom Line

For most houses: the Craftsman 9-gallon, with a wet filter on hand. Where the basement or utility room takes the water, the Shop-Vac 12-gallon Pump Vac empties through a garden hose. For spills and small spaces, the Craftsman 2.5-gallon; if you own M18 batteries, the Milwaukee M18 2-gallon keeps the cord out of the water. Whichever you buy, use a GFCI outlet, never vacuum anything flammable or hot, stay out of standing water that could be energized, and leave sewage to professionals. Then fix the source; a leak sensor catches the next one while it's still a puddle.

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