Does the Submarine head vacuum and mop at the same time?

No - the Submarine head is mop-only with no suction component, so it can't pick up dry debris on its own. Owners run the standard vacuum head first to pick up dry mess, then swap to the Submarine head for a separate wet-mopping pass over stains.

Can I use the Submarine head on my existing Dyson V15?

No - the Submarine wet-roller head is only compatible with the V15s Submarine model itself, not the original V15 Detect. If you already own a standard V15, you'd need to buy the full V15s Submarine unit to get the mopping function.

How long does the battery actually last, and does it degrade?

Rated up to 60 minutes on low power but only around 8 minutes at max suction, which is typical for Dyson's cordless line. Owner reports describe noticeable battery and power degradation after a year or two of regular use, which is one of the more common long-term complaints.

Is it good for pet hair?

Yes - this is one of its strongest points in owner discussions. The anti-tangle brush design combined with strong suction handles dog and cat hair well, with one owner specifically crediting it with keeping shedding under control that other vacuums couldn't manage.

What's the most common long-term problem owners report?

Durability just past the warranty window - a recurring theme is the machine developing faults shortly after coverage ends, with cyclone assembly replacements costing $150 or more out of pocket. Registering the warranty promptly and considering an extended plan is worth it given this pattern.

How does the wet-mop feature compare to a dedicated wet-dry vacuum like a Tineco or Roborock washer?

The Submarine head only mops - it doesn't vacuum and mop simultaneously the way a dedicated hard-floor washer does, and it leaves streaks on large wet spills. If mopping is a bigger priority than occasional dried-stain touch-ups, a true wet-dry washer is a better fit; the V15s Submarine's advantage is Dyson-level dry pickup with mopping as a bonus, not the reverse.

Hard Floor Washer

~$724

Dyson

Dyson V15s Detect Submarine

Name: Dyson V15s Detect Submarine
Brand: Dyson
Price: 724 USD
Availability: InStock

This is Dyson's first wet-and-dry stick, and it's really two machines in one: swap the standard cleaner head for the Submarine roller and it scrubs and vacuums hard floors simultaneously, then swap back for a normal Motorbar head to run carpets and stairs. The Submarine head has separate clean and dirty water tanks so it isn't just pushing dirty water around, and the laser dust detection carries over from the V15 Detect. The honest caveats: the wet roller needs a self-clean cycle and the dock plumbed for water disposal, the dry dustbin is small at 0.76L, and switching heads mid-clean is an extra step compared to an all-in-one washer like a Bissell CrossWave. At 8.3 lbs with the wet head attached it's also noticeably heavier than a standard V15.

Approx. price

~$724

Suction

240 AW

Filtration

Whole-machine HEPA-sealed

Best For

Mixed hard-floor and carpet homes who want one machine instead of two

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Specifications

240 AW

60 min

Yes

Whole-machine HEPA-sealed

Type

Hard Floor Washer

Noise Level

81 dB

Dustbin Capacity

0.76 L

Water Tank

300 ml

App Control

Weight

8.3 lbs

Warranty

2 years

Model

473814-01

Highlights

Vacuums and washes hard floors in one passSeparate clean/dirty water tanksSwaps to standard carpet head

Pros

✓One machine handles both wet mopping and dry vacuuming without switching appliances
✓Separate clean/dirty water tanks keep you from mopping with dirty water
✓Laser dust detection shows exactly where debris is on hard floors
✓Swaps back to a standard fluffy or Motorbar head for carpets and stairs
✓60-minute max runtime is competitive for a wet-roller stick

Cons

✗Wet roller head requires a self-clean/dry cycle after every use
✗Dry dustbin capacity (0.76L) is on the small side for whole-home cleaning
✗Significantly more expensive than dedicated hard-floor washers
✗Heavier to maneuver than a standard V15 with the wet head attached
✗Replacement rollers and filters add to long-term cost

Owner Insights(86 discussions)

The V15s Detect Submarine pairs Dyson's flagship dry-vacuum tech - laser dirt detection, auto suction adjustment, sealed HEPA filtration - with a first-of-its-kind wet-mop attachment, and owner sentiment reflects that split personality. Aggregated owner discussion puts it around 68% positive out of roughly 86 reviews, ranked among the better cordless vacuums overall, but with durability complaints serious enough to weigh against the flagship feature list.

Day to day, the dry side of the machine is what earns its reputation: independent testing found it excelled at hard floor and carpet debris pickup, the laser reveals dust owners didn't know was there, and pet hair comes up cleanly thanks to the anti-tangle roller. The Submarine head genuinely lifts dried-on stains in a pass or two, but it's a supplemental mop, not a wet-dry hybrid - no suction, can't handle big spills without streaking, and it only fits this specific model. The real owner risk is longevity: a recurring pattern of units failing just past warranty, with $150+ cyclone repairs, and batteries that visibly weaken after a year or two of regular use.

Buy it if you want best-in-class dry pickup and pet-hair performance with an occasional-use mop feature for dried spots, and you're comfortable registering the warranty and budgeting for eventual repairs. At its ~$724 list price (often near $500 on sale) it's priced above most rivals; a Roborock or Tineco wet-dry stick vacuum combines true simultaneous suction-and-mop for meaningfully less money, at the cost of Dyson's dry-pickup and pet-hair edge - the strongest alternative for buyers who mop more than they mop up dried stains.

Pros

+The green laser dirt-detection beam reveals fine dust on hard floors that's genuinely invisible to the naked eye, so owners stop missing the same spots they used to walk right past
+Pet-hair pickup is a standout - one dog owner put it plainly: without it they'd 'feel defeated by all the hair', and the anti-tangle roller keeps that hair from wrapping the brush
+Auto suction adjustment ramps power up on dirtier patches and eases off on clean floor automatically, which independent testing confirmed extends runtime versus running max power everywhere
+The Submarine wet-roller head is 'really excellent' on tough dried-on stains in testing - most dried spots lift in one or two back-and-forth passes
+The LCD screen shows real-time battery percentage adjusted for the attachment and power level in use, so you're not guessing whether you'll finish a room before it dies
+The self-contained Submarine head is easy to rinse clean after use, unlike full wet-dry combo machines that contaminate internal tanks and hoses with dirty water
+Whole-machine HEPA-sealed filtration keeps dust locked in rather than leaking back into the air, which allergy-sensitive owners specifically call out

Cons

−Durability is the most serious complaint in owner discussions - multiple owners report the machine failing shortly after the warranty period ends, with cyclone assembly replacements running $150 or more
−Battery capacity and motor power noticeably decline over a year or two of regular use, and aging units struggle more with large debris and carpet than they did new
−The Submarine head is mop-only with no suction at all - it can't pick up dry debris, so cleaning is a two-step process: vacuum first with the standard head, then swap heads to mop
−It struggles with large wet spills, tending to leave streaks rather than absorbing the mess cleanly in one pass
−The Submarine head only works with the V15s - it's not backward compatible with a standard V15 someone might already own
−The trigger must be held continuously to run, and owners doing long cleaning sessions report real hand fatigue
−At around $500-725 depending on sale timing, it's Dyson's most expensive stick vacuum, and owners weigh that against the reported durability issues
−Recorded noise levels around 81dB are loud enough to notice in shared living spaces or apartments