Danby DDW631SDB at a glance
- Water supply
- Faucet-fed; no manual-fill tank is documented.
- Loading evidence
- Six-place-setting category; compare your actual dishes with the manual loading diagram.
- Installation check
- Verify faucet compatibility and the wider footprint before choosing a permanent spot.
- Daily routine
- Manual Normal program: 110 minutes, 10.8 L and 0.36 kWh. These are published values.
Research summary, not a hands-on test. Manufacturer source · Detailed source checks · Compare the six-model reference.
Research editor: Nicholas Bauer, Founder & Research Editor · Manufacturer sources reviewed October 6, 2026
Our take: shortlist it for the space, then check the tap
The Danby is a useful alternative to the taller tank models in our comparison. Its appeal is practical: the closed body may suit a lower opening. That advantage only matters if you can also accommodate its width, hoses, opening door and water connection.
We would put it on a shortlist for someone with a workable tap and a dedicated counter spot. We would pause if keeping that tap available during every wash is essential. This is a research review; we have not measured cleaning, noise or reliability.
Danby DDW631SDB: what the sources establish
- Body height: 17.25 inches
- Danby lists a 21.65-inch width, 20.65-inch depth and 17.25-inch height. Its shorter body can help under a lower cabinet, but hoses, door travel and installation clearances still need their own space.
- Normal-program water: the official figures differ
- The product page states 3.1 US gallons / 11.7 liters. The manual program table (printed page 9) gives 10.8 liters for Normal, alongside 110 minutes and 0.36 kWh. We cannot establish why the figures differ. Treat a running-cost estimate as an assumption, not a precise prediction.
- Drying: an option is not a standalone program
- The controls describe an extra-drying option, while the manual drying guidance (printed page 10) says there is no drying cycle. That distinction matters if you want to run a separate dry-only session. Allow time for cooling and follow the unloading guidance.
THIRD-PARTY HANDS-ON EVIDENCE
Danby cleaning results: what an independent test adds
Reviewed’s report by Kyle Hamilton and Julia MacDougall, published May 11, 2021, summarizes its US team’s countertop-dishwasher tests. It reported strong stain removal from the DDW631SDB, while also observing spinach redeposited on some dishes. Its recorded Normal wash was approximately 100 minutes. Reviewed discloses affiliate links.
Useful evidence, with a date attached: this is a report about the unit and test conditions used then. It is not our test, a current six-model comparison, or evidence of how long a new unit will last. The public summary does not give enough detail to reproduce the complete protocol here. See the original for its photos and full context.
Why the test time does not replace the manual
The 110-minute Normal-program figure elsewhere in this guide is a published manual value. A reviewer’s approximately 100-minute observation and a manual’s program table are different kinds of evidence. Keep both labeled; do not turn the shorter number into a guaranteed finish time or infer that a current unit has the same software, conditions or cycle behavior.
Apply the finding to your purchase
Cleaning evidence is relevant only after the model works with your faucet, counter and usual dishes. Use the dish-load planner to list what you want washed, then compare the full mixed load with the manual’s rack diagram. Judge a short wash separately from the time needed to unload and dry anything still wet.
External review checked November 2, 2026. No reviewer photographs, scores or test data tables are reproduced. We have not tested this model against the HAVA or COMFEE machines.
Picture a normal evening
Before shopping, imagine the machine in its intended position with its door open. Can you still reach the sink, prepare food and empty the rack? A countertop appliance earns its space by taking over a repeatable task. Moving several other appliances before each wash can make a promising purchase feel like another chore.
Use our faucet compatibility guide before ordering adapters. The Danby manual describes a quick-connect arrangement and specifies its supplied hoses; a longer replacement is not an automatic solution to an inconvenient location.
Fast washing and dry dishes are different questions
The manual lists a 45-minute Speed program. That number describes a program, not our verified cleaning result. Its drying guidance also matters: there is no separate drying cycle, and some items may remain wet. If putting everything straight into a cupboard is your priority, read those instructions before deciding that a shorter wash is better.
Compare the tasks you want to avoid with the tasks you would keep: loading, unloading, caring for the filter and handwashing unsuitable items. Our cost guide and calculator helps turn that routine into a budget.
Who should keep looking?
Choose a tank-focused shortlist if your faucet is unsuitable or you want the supply tap free. Start with the HAVA R01 versus Danby comparison. If the Danby still suits your space, inspect the exact model, seller and return conditions before buying; similarly named variants are not interchangeable.
Check the exact model and current offer.Affiliate shopping link
Sources: Danby specifications and official owner’s manual. Manufacturer sources reviewed October 6, 2026.
Choose it for a workable routine, not a program-count contest
Shortlist it when the faucet connection works and the wider body has a permanent place. Skip it for this setup if you need tank filling or your faucet documentation rules out an appliance connection.
Before ordering, decide when you would start a wash and when you next need the sink. The machine can take over a washing task, but its location and connection should not make preparing the next meal harder.
How it compares with the COMFEE six-place model
The relevant alternative is CDC22P2AWW, not COMFEE’s smaller tank model. Their manuals publish matching Normal-program time, water and energy figures. That is a reason to look closely at fit, the exact offer and your preferred features instead of inventing a large efficiency advantage.
Our Danby vs COMFEE comparison puts those figures and their source locations side by side. It also explains why similar specifications do not prove identical cleaning or durability.
References: Danby manual, printed page 9 program table · COMFEE manual, printed page 9 program table. Published program values are not measurements from our kitchen.
Stock the right supplies
Danby specifies liquid rinse aid and discourages detergent tablets or gel packs. The setup guide explains one rinse-aid option and what to check before buying.
Choose the right detergent format
Our detergent guide makes the DDW631SDB’s tablet and gel-pack restriction easier to spot before you buy supplies. Read the detergent guide →
Questions to settle before ordering
Can I pour water into the DDW631SDB instead of connecting a faucet?
No refillable tank is documented for this model. Its setup uses a compatible faucet connection. If keeping the supply tap free is essential, start with our tank-versus-faucet comparison.
Is the 45-minute Speed setting a complete dinner-load shortcut?
The manual reserves Speed for lightly soiled dishes. A short program is not a promise about dried-on food or dry plastic containers. Match the program to the load, then plan when you need those items again.
Does the six-place rating make it better than the COMFEE CDC22?
Not by itself. Their linked manuals show the same Normal-program time, water and energy figures. Compare verified fit, tap setup, supplies and the current offer. We have no measured evidence that one cleans better or lasts longer.
