Best iRobot Vacuums for Water tank

Water tank Decision Dashboard

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#1 Roomba Combo j9+ Robot Vacuum & Mop
4.5
9 reviews

Auto-fill dock is a major convenience, with many citing weeks of mopping before refills in average use. A few find the reservoir awkward to handle/refill, but the concept and day-to-day...

Pros: Pet-Ready Features, Mop lifting system

Cons: Corner Cleaning (Robot), Carpet — High-Pile Pickup

#2 iRobot Roomba Combo i5 Robot Vacuum
3.4
4 reviews

The combo bin water capacity is described as modest (one measured review cites a low-200 ml range), which suits light maintenance mopping but may require attention for larger areas.

Pros: Build quality &amp, durability

Cons: Mop lifting system, Cord management

#3 Roomba Combo j7+ Robot Vacuum & Mop
3.1
2 reviews

Water tank is considered small, often requiring frequent refills for larger homes or higher water settings; mopping remains manual-maintenance heavy compared with newer docks that refill automatically.

Pros: Mop lifting system, Hard Floor — Fine Dust Pickup

Cons: Support &amp, Reliability

#4 iRobot Roomba Combo 10 Max
3.0
4 reviews

Water-tank feedback is mixed: setup and capacity can be good, but horizontal tanks are criticized as spill-prone and awkward.

Pros: Hair Pickup — Hard Floors, Carpet — Medium-Pile Pickup

Cons: Heating element, Kid-friendliness

#5 iRobot Roomba J5+ Combo Vacuum & Mop
2.9
4 reviews

Water tank feedback is mixed to negative: reviewers called it small, noted leaks or seepage, and wished for better level feedback.

Pros: Pet-Ready Features, Ease of use

Cons: Self-cleaning cycle, Dock noise

#6 iRobot Roomba Robot Vacuum and Mop Combo Essential, Y0140
2.7
3 reviews

The water tank works for basic mopping, but reviewers criticize the shared bin/tank space and the need to empty unused water after each job.

Pros: Ease of use, Accessories and Tools

Cons: Innovation compared to competitors, Area Rug Handling