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RELEASED 2024.04REASSESSED 2026.09.15Compare
Roborock

Roborock S8 Max Ultra with Refill & Drainage System

The S8 Max Ultra robot on a dock plumbed into household water and drainage, so tank refills and dirty-water trips disappear. Installation needs a water line, a drain and space against a wall, and no review of this plumbed version was found.

Roborock S8 Max Ultra with Refill & Drainage System
FIT CHECK

Will the Roborock S8 Max Ultra with Refill & Drainage System work in your home?

Describe your home using the controls. Each choice reads the spec sheet for you, flagging where the Roborock S8 Max Ultra with Refill & Drainage System is built for your space and where it isn’t.

Home size

Primary floors

Mopping needs

Upkeep you accept

See every robot vacuum suited to these conditions

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

OWNERSHIP

Living with it.

Strong robot record; the plumbed dock itself is untested independently.

Stableowner-reported arc

The record so far

Independent lab testing in 2024 of the standard-dock S8 Max Ultra found near-perfect surface pickup and strong mopping, but below-average airflow and carpet deep cleaning; no review covers the refill and drainage dock.

What goes wrong3 documented · 0 self-recover
Common
Below-average airflowLess pull on fine debris
Owner fixUse Max+ suction on carpetper Independent lab test, 2024
Common
Weaker carpet deep cleanEmbedded grit left in carpet
Owner fixRun a second carpet passper Independent lab test, 2024
Occasional
Misses some obstaclesContact with small objects
Owner fixClear cords and small items firstper Independent lab test, 2024
Upkeep routine
Seasonal4×/yr

Refill the 580 ml detergent tank, which Roborock says lasts over three months.

When duewhen worn or full

Replace the 2.5 L dock ; Roborock sells 6-packs.Typical for robot vacuums: every 3-6 months

Check the water inlet and drain connections for leaks, per Roborock's installation notes.

Replace mop cloths and edge mop cloths; Roborock's US store sells both.Typical for robot vacuums: every 3-6 months

Replace the washable and main brush pack, which Roborock's US store sells for the S8 Max Ultra.Typical for robot vacuums: filter every 3-6 months, main brush annually

Cost over time

$1,699 to buy. Ongoing running cost for this model hasn’t been assessed yet.

Step-by-step fixes
Has Weak Suction or Isn’t Picking Up?Keeps Going in Circles?App Says Offline or Won’t Connect?All robot vacuum guides
Safety notes2 cautions · 1 note
  • CautionWater pressure limitRoborock specifies 0.1 to 0.4 MPa supply pressure and a reducing valve above 0.4 MPa.
  • CautionShut off water before installingRoborock says to disconnect dock power and close the water supply before installation.
  • Hot water and air in the dockThe dock washes pads in water up to 140 F and dries them with hot air.
SPECIFICATION

The full spec sheet.

Priced above the category median, with every figure charted against the category below.

13.9 in dia3.8 inDimensional drawing
Key specificationsManufacturer-published
FootprintThe width, depth and height of the robot itself, without its dock.
13.9 in dia · 3.8 in tall
BatteryStored energy in watt-hours; a larger pack runs longer, not harder.
75 Wh · Li-ion•
Wi-FiThe bands the robot can join; many models need a 2.4 GHz network to set up.
Supported
VoiceThe assistants the maker's app links to; the robot itself does not listen.
Alexa, Google Home
Dust bagA bag inside the dock that the dock empties the robot's bin into; you replace the bag.
2.5 L
Onboard dustbinThe bin inside the robot; an auto-empty dock moves its contents into a bag.
470 mL
Mop liftHow far the mop pad rises when the robot crosses carpet.
20 mm
Threshold climbThe tallest lip the robot is rated to cross; a door sill is about 0.8 in.
0.8 in (20 mm)
Dock dimensions
16.5 x 16.1 x 11.8 in
Mapping & navigation

PreciSense LiDAR with Reactive 3D structured-light obstacle avoidance

Where it lands · ranked across 260 robot vacuumsThis robotMedianTypical range
SuctionAir pressure the fan produces at the intake, in pascals, measured the maker's own way.8,000Pamax mode
1,000 Pa42,000 Pa
Near median
RuntimeThe maker's stated running time on one charge, at a standard setting.180min

60 min360 min
Near median
PriceThe maker's list price, not a price found in a shop.$1,699.99

$160$2,600
Above median

Position shows where the figure sits across the tracked category, not a quality judgment. Suction in Pascals has no standard test method, and the published figure is a peak-mode claim, so it is comparable only within a brand and generation.

Official referencesProduct page
RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon
Just launched
Active updates
Settled
Discontinued
  1. Sep 2026 · AssessmentReadiness assessed as Ready Now
  2. Sep 2026 · AssessmentRobovations Score recorded at 72 of 100
  3. Apr 2024 · ReleaseRoborock opens US sales of S8 Max Series with refill and drainage dock option
Editorial comparisons

How Roborock S8 Max Ultra with Refill & Drainage System compares.

All comparisons →
Tech shiftA bedroom at night with the lights off, seen from the floor: a white robot vacuum comes down the bedside lighting the boards ahead with its own LED, over a dropped sock, while a black camera robot sits stopped in the dark with only a faint patch of light at its bumper.
Robot Vacuums3 robots

LiDAR vs camera robot vacuums: which works in the dark?

Robot vacuums navigate dark rooms through different sensor architectures. We compare LiDAR-first designs against camera-dependent systems across obstacle detection, low-light performance, and scheduling reliability.

vs iRobot Roomba j7+ · Dreame X50 Ultra
Common questions

What people actually ask.

5 answered
OperationWhat does the S8 Max Ultra Refill & Drainage System need for installation?
Roborock specifies 0.1 to 0.4 MPa water pressure, a drain outlet at least 0.015 m across, pipe runs within about 6 m, and a spot against a wall on a hard floor.
OperationHow is this different from the standard S8 Max Ultra?
The robot is the same; the dock connects to household water and drainage instead of using clean and dirty water tanks that are emptied by hand.
OperationDoes the S8 Max Ultra lift its mop on carpet?
Yes. Roborock lists a 20 mm lift, and independent lab testing notes that is up from 5 mm on the earlier S8 Pro.
OperationDoes the S8 Max Ultra have a camera?
No. It avoids obstacles with structured light; the S8 MaxV Ultra adds a front camera.
OperationHow often does the detergent need refilling?
Roborock says the 580 ml detergent tank supports over three months per fill.

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Verified$899
Strong71/100
Availability

Where it's sold

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Robovations. "Roborock S8 Max Ultra with Refill & Drainage System: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed September 2026. https://robovations.com/robots/roborock-s8-max-ultra-with-refill-drainage-system/

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By RobovationsUpdated: Sep 15, 2026
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