Why tank-style countertop dishwashers are different
A countertop dishwasher with a built-in water tank is made for apartments, rentals, RVs, dorm-style kitchens, and older spaces where tying up the faucet is annoying. The tradeoff is simple: the tank models are easier to place and use, but they usually hold fewer dishes than faucet-only countertop dishwashers.
If you want the largest portable dishwasher with a water tank, focus less on the word “portable” and more on three numbers: place-setting capacity, interior height, and tank size. Most built-in-tank machines use a 5L reservoir; a few newer models advertise 6L tanks or roomier racks, but they still cannot match the 6-place-setting Danby-style countertop units that require a faucet connection.
How we picked these models
We prioritized built-in water tanks, realistic rack capacity, normal counter fit, wash-cycle flexibility, drying, and owner-friendly setup. We also avoided recommending oversized “portable” rolling dishwashers here because those generally need a faucet hookup and take floor space, which does not solve the no-hookup apartment problem.
Prices move often, especially on Amazon and Walmart, so treat the ranges below as typical street prices rather than fixed pricing. Before buying, measure the space under your cabinets and compare your largest dinner plates against the stated rack dimensions.
Most practical picks for 2026
1. HAVA R01 — safest pick for most small kitchens
The HAVA R01 is the easiest recommendation if you want a tank-style countertop dishwasher that feels polished rather than experimental. Its product listing shows a 5L built-in tank, compact dimensions around 16.8 inches deep by 16.7 inches wide by 18 inches high, and multiple wash programs. HAVA’s EU listing also describes 3 place settings, 7 washing cycles, and a reinforced glass door rated around 60 dB.
Tank size: 5L built-in reservoir
Capacity: about 3 place settings
Dimensions: roughly 16.8 x 16.7 x 18 inches
Best for: renters, couples, RVs, and daily dishes without faucet hookup
Typical price: about $250–$330 depending on sale timing
The key limitation is height. Like most compact tank models, it is great for bowls, mugs, utensils, smaller plates, baby bottles, and a few daily items, but it is not a replacement for a full-size dishwasher after a large dinner.
2. Hermitlux 5-place model — largest-feeling option if the listing matches your market
Hermitlux is worth checking if your main search phrase is “largest countertop dishwasher with water tank.” Some current Hermitlux listings advertise a 5 place-setting capacity in a body around 16.85 x 16.73 x 18.23 inches, which is unusually roomy for this class. Other Hermitlux regional models are listed as 4 place settings, so confirm the exact model number before buying.
Tank size: commonly 5L on portable models
Capacity: up to 5 place settings on select listings
Dimensions: about 16.85 x 16.73 x 18.23 inches on the larger listing
Best for: buyers who want maximum rack capacity in a tank-style machine
Typical price: about $260–$360
This is the one to shortlist if you regularly run out of space in smaller 2-place machines. The caveat is consistency: Hermitlux sells multiple similar-looking models, and capacity claims vary by listing and region.
3. Farberware FDW05ASBWHA — compact and easy to live with
The Farberware Complete portable countertop dishwasher remains popular because it is small, straightforward, and widely available. The manual lists 2 place settings and 750 watts, while retailer listings commonly show a 5-liter tank and dimensions around 14.96 inches deep by 16.14 inches wide by 17.51 inches high.
Tank size: 5L built-in reservoir
Capacity: 2 place settings
Dimensions: roughly 14.96 x 16.14 x 17.51 inches
Best for: one-person apartments, baby bottles, mugs, and small daily loads
Typical price: about $220–$300
This is not the largest option, but it is one of the more space-efficient choices. Pick it when counter depth matters more than squeezing in one extra plate.
4. COMFEE’ tank models — value pick when on sale
COMFEE’ is a good value brand to watch, especially because some listings advertise a 6L built-in water tank and Energy Star portable countertop designs. Good Housekeeping has also highlighted COMFEE’ models among its countertop dishwasher picks, including a 5L portable mini dishwasher and a 6L countertop model.
Tank size: 5L or 6L depending on model
Capacity: usually compact 2–3 place-setting territory
Best for: budget shoppers who want no-hookup convenience
Typical price: often about $220–$320
COMFEE’ can be the smartest buy during a sale, but check the rack photos carefully. A larger tank does not automatically mean a larger interior basket.
What to look for before buying
Tank vs faucet hookup: A built-in tank lets you pour water into the machine and drain into a sink or bucket. A faucet-connected countertop dishwasher usually holds more but blocks the faucet while running.
Plate height: Many unhappy buyers discover too late that their dinner plates only fit at an angle. If you use 10.5-inch or larger plates, verify the rack layout from owner photos, not just the marketing copy.
Drying: Hot-air drying or auto ventilation matters in small apartments because wet interiors can smell if the door stays closed. If you plan to run loads overnight, drying quality is worth paying for.
Our verdict
For most people, the HAVA R01 is the best balance of capacity, tank convenience, and proven design. If your priority is the biggest possible rack in a water-tank countertop dishwasher, compare the larger Hermitlux listing first, then verify the exact capacity before checkout. Farberware is the compact fallback, while COMFEE’ is the value pick when the price drops.
The honest answer is that no tank-style countertop dishwasher is truly “large.” But for one or two people who want clean daily dishes without plumbing changes, the right model can make a dishwasher-less apartment much easier to live in.