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Support for your Dyson V12s Detect Slim Submarine™ wet and dry vacuum cleaner

Here you can find helpful tips and advice, how-to videos, your user manual and more.

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How to set up your Dyson vacuum

User manual

User manual

Download the user manual for your Dyson V12s Detect Slim Submarine™ wet and dry vacuum cleaner.

User manual

5.8 MB

Charging your battery

It's important to charge the battery before using your vacuum for the first time. This helps the battery monitoring system's algorithm more accurately calculate remaining run time.

Video showing how to charge the battery.

Dock set up and charging

You will receive one of the following docking stations with your machine.

Fitting the wall dock

Before setting up the wall dock, please download your user manual and read the instructions carefully. Or watch our video guide.

User's hands attaching dock to the wall fitting.

Setting up the Floor dok™

Before setting up your Floor dok™, please download your user manual and read the instructions. Or watch our how-to video below.

Vacuum sitting charging on the Floor dok.


Get to know your LCD screen, displays and power modes.

Power modes

Getting to know your power modes

Your vacuum has three power modes for dry vacuum-cleaning tasks: Auto/Med mode, Eco mode, Boost mode. Change mode by tapping the selection button.

Get to know your power modes for wet cleaning

When you attach the Submarine™ wet roller head, a water droplet icon appears on screen, indicating automatic switch to wet cleaning.

Understanding your LCD screen

During cleaning, your LCD screen shows the particle count graph, with remaining run time colour-coded to indicate the power mode selected.

LCD screen

Cleaner heads

Getting to know your cleaner heads

Your Dyson V12s Detect Slim Submarine™ wet and dry vacuum cleaner is engineered for all-in-one cleaning power. Simply switch the cleaner head according to the cleaning task and surface.

Submarine™ wet roller head

Washes hard floors – tile, stone, wood, ceramic, vinyl, linoleum and laminate. The motorised wet roller picks up liquids, debris and tough stains. For best results, it's important to wash the Submarine™ wet roller head after every use.

Submarine wet roller cleaner head removing a dirty spill from a hard floor.
  • Green illumination emitting from the Fluffy Optic cleaner head.

    Fluffy Optic™ cleaner head

    Cleans hard floors. Dyson illumination makes invisible dust visible on hard floors, showing you where to clean. Anti-static black carbon fibre filaments pick up fine particles from hard floors and crevices.

  • The Dyson Digital Motorbar cleaner head.

    Digital Motorbar™ cleaner head

    Deep cleans carpets and rugs. The motorised brush bar drives stiff nylon bristles into carpet to remove deep-down dust. Polycarbonate hair removal vanes automatically de-tangle hair from the brush bar as you clean.

Washing the wet roller

To maintain performance, it's important to wash the wet roller after every clean. Simply detach, wash with cold water, leave to dry and reattach. Watch the maintenance video here.

User's hands washing the wet roller cleaner head under a tap.


Essential maintenance

Watch our video guides on how to keep your machine performing at its best.

  • A user cleans the vacuum cleaner's bin with a duster.

    Emptying and cleaning the bin

    You can help to maintain suction by emptying the bin before the debris rewaches the MAX line. Remove the bin from the machine to clean thoroughly.

  • A user clearing a blockage from a dismantled machine.

    Checking for blockages

    If your machine detects a blockage, the motor will pulse six times to alert you – and you won't be able to continue until the blockage is cleared. Remove the wand, bin and cleaner head to find and clear the blockage.


Changing the battery

If you have an additional battery, you can switch batteries to achieve longer cleans. Simply press the red battery release button, and slide the battery off your machine. Your extra battery clicks into place. Watch the video.

The user attaching a replacement Dyson battery.

Washing the filter

Your Dyson V12s Detect Slim Submarine™ wet and dry vacuum cleaner has a washable filter. We recommend washing it once a month to maintain optimum suction power.

  • User tapping the filter to remove loose dust and debris.

    2. Remove dust and debris

    Tap your filter unit lightly on the side of the sink or bin, to remove loose dust and debris.

  • User washing the filter under a tap.

    3. Wash the filter

    Wash the filter with cold tap water, gently squeezing the water out with your hands. Avoid using detergent or washing in a dishwasher or washing machine.

  • 4. Gently shake

    Fill the inside with water, cover both sides with your hands, and shake lightly. Wash until the water is clear.

  • Filter being placed in a well-ventilated area.

    5. Dry for at least 24 hours

    Allow the filter to air dry in a well-ventilated area for at least 24 hours, with the wide mouth facing down.

  • Filter left to dry completely for 24 hours.

    6. Let it dry completely

    Your filter must be completely dry before you return it to your machine, or it could damage the motor. Do NOT dry in a tumble dryer, microwave or near a naked flame.

  • Video still of a user's hands washing the filter under a tap.

    1. Turn off the power

    Remove your vacuum from the docking station and twist the filter counterclockwise to remove it from the body.


Dyson V12s Detect Slim Submarine™ accessories

Dyson-engineered accessories are ergonomically designed for cleaning up high, down low – and everywhere around your home.

  • User detaching the wand to use the Built-in dusting and crevice tool.

    Built-in dusting and crevice tool

    Wand detaches in a click to reveal a ready-to-go crevice tool stored inside for on-the-spot cleans.

  • Hair screw tool cleaning a mattress.

    Hair screw tool

    Anti-tangle conical brush bar picks up long hair and pet hair – and spirals it straight into the bin. Fast.

  • Crevice tool reaching into a tricky space.

    Crevice tool

    Engineered for precise cleaning around tricky edges and into hard-to-reach narrow spaces.

  • The wide nozzle and brush shown cleaning a skirting board, and debris on a sofa.

    Combination tool

    Two tools in one – wide nozzle and brush, for quick switching between cleaning and dusting tasks around your home or car.

Need a different tool?

If you need attachments for other cleaning tasks around your home, click below to view all Dyson tool kits, tools and accessories.

Various Dyson tools demonstrating versatility for whole-home cleaning.


The wet roller can be washed with a common household anti-bacterial detergent, diluted according to the manufacturer's recommended ratio. We recommend doing this after each clean to maintain hygiene.

Only the Dyson SubmarineTM wet roller head should be used to pick up wet debris and liquid spills. Engineered with intelligent power diversion and mode detection, all aspects of wet cleaning are contained within the wet roller head. Water and debris is extracted from the roller into the waste tray, which sits directly behind the wet roller using Dyson’s new wet technologies.

The Dyson Submarine™ wet roller head is not compatible with any of our other vacuums, including pre-purchased V12. To intelligently switch between wet and dry cleaning, this version of the machine has been reprogrammed. Our previous software is not compatible with wet floor cleaning.

The Dyson Submarine™ wet roller head has been engineered for hard floors.

We recommend replacing the wet roller every six months, depending on how often you use your machine, to help maintain optimum performance.

Whilst not necessary for cleaning performance, we understand that some users will want to combine a cleaning detergent with the wet roller head. If you decide to use detergent, please follow the manufacturers guidance on the recommended dilution. We do not recommend putting neat detergents in the clean water tank.

Speak with a Dyson Expert

Find help and advice quickly. Chat with a Dyson Expert on WhatsApp, or ask Dyson's Digital Assistant.

Dyson Expert ready to help.

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