Using a commercial dishwasher comes down to a simple routine: scrape and pre-rinse, load by type without overcrowding, dose the correct detergent and rinse aid, run the right cycle, then unload from the bottom rack first. Choosing the right machine is the bigger decision. Match the dishwasher type to your venue and your peak workload, and you will keep up with service while meeting the cleaning and sanitising standards a food business has to hit.
📋 What this guide covers
- How to operate a commercial dishwasher step by step
- The main dishwasher types and who each one suits
- The factors that should drive your choice
- Maintenance that protects performance and lifespan
How to use a commercial dishwasher
Exact steps vary by model, but the workflow below applies to almost every machine on the market. Train every staff member on it, because most wash problems trace back to loading and chemical dosing rather than the machine itself.
- Preparation: Scrape off excess food and remove solid debris. Empty glasses and cups of liquid before loading.
- Loading: Organise by type, with plates, glasses and utensils in their proper racks. Avoid overcrowding so water and detergent reach every surface.
- Detergent and rinse aid: Dose the correct commercial detergent and rinse aid to the manufacturer's specification. The right chemistry is essential for effective cleaning and for preventing buildup.
- Select the wash cycle: Most machines offer several cycles for different soil levels and dish types. Pick the cycle that matches the load.
- Close and start: Shut the door securely and start the cycle. Some models use a digital display for cycle selection.
- Drying cycle: If your machine has one, make sure it is active to remove moisture and prevent water spots.
- Unloading: When the cycle finishes, unload from the bottom rack first so water does not drip onto clean items above.
- Inspect and store: Check for cleanliness, rewash anything that is not fully clean, then store items in their designated areas.
🔧 Pro tip, pre-rinse properly
A quick scrape and pre-rinse at a pre-rinse station removes the heavy soil that clogs filters and dulls results. It is the single biggest habit that keeps a commercial dishwasher washing well, shift after shift.
Types of commercial dishwasher
Different venues have different bottlenecks. The commercial dishwashers we supply break down into a few clear categories.
| Type | Best for | Notes |
|---|---|---|
| Undercounter | Cafes, bars, small to medium kitchens | Fits under a bench; fast cycles |
| Door-type / pass-through | Busy restaurants and cafeterias | Higher capacity than undercounter |
| Conveyor / flight-type | Large-scale and institutional kitchens | Continuous, automated throughput |
| Pot and pan | High-volume cooking lines | High-pressure jets for stubborn residue |
| Glasswasher | Bars and venues with lots of glassware | Gentle cycles protect delicate glass |
- Undercounter dishwashers: Compact units that fit under a countertop and run quick cycles, ideal where space is tight.
- Door-type dishwashers: Built for higher capacity, suiting larger restaurants and busy cafeterias.
- Flight-type dishwashers: Suited to large-scale operations such as institutional kitchens and industrial catering, where dishes load onto a conveyor and the machine handles the wash automatically.
- Pot and pan dishwashers: Heavy-duty machines with high-pressure jets and powerful pumps to shift stubborn food residue from large cookware.
- Glasswashers: Designed for bars, using gentle cycles to protect delicate glassware from chipping.
Bars and pubs that get through volumes of glassware often run a dedicated glasswasher alongside their main dishwasher, while large venues moving thousands of plates a day lean on conveyor machines. We supply trusted brands including Washtech, Eswood, Meiko and ELITE across these categories.
Key factors to consider
Choosing well means weighing several factors against how your kitchen actually runs.
Capacity and throughput
Work out how many racks or dishes you need to clean per hour at peak. The machine has to keep pace with your busiest service, not your average one.
Space constraints
Measure the available footprint. Undercounter machines suit tight kitchens, while larger venues can house conveyor or flight-type models.
Water and energy efficiency
Efficient machines lower both your utility bills and your environmental impact. Look for strong water and energy ratings, and remember that water use per rack adds up fast across a year of service.
Cycle times
Faster cycles lift productivity during peak periods. A machine that turns a rack in 60 to 90 seconds clears a backlog far quicker than one running long cycles.
Cleaning performance
Look for adjustable water jets, multiple wash arms and specialised cycles for different dish types. These features handle mixed loads more reliably.
Maintenance and service
Accessible parts and a reliable service network keep downtime short. A dishwasher that is hard to service becomes a problem the first time it breaks during a Friday rush.
Budget
Set a range and shop within it, but do not default to the cheapest unit. Durability and performance drive long-term savings. Atlantic Equipment also offers financing options to spread the cost.
Noise levels
In open-kitchen layouts, a quieter machine makes for a more pleasant dining room and a calmer workspace.
Additional features
Some machines include built-in water softeners, reverse osmosis systems or automatic detergent dispensers. Weigh whether these genuinely suit your water quality and workflow before paying for them.
ℹ️ Wash and sanitise
Commercial dishwashers are expected to both clean and sanitise. Hot-water machines reach high rinse temperatures, while low-temperature machines rely on a chemical sanitiser. Match the machine and chemistry to your water supply and your food-safety requirements.
Maintenance and care
Good upkeep is what separates a machine that lasts a decade from one that fails early. Build these into your routine.
- Regular cleaning: Follow the manufacturer's guidance for cleaning the interior, filters and spray arms, and clear debris that can clog the system.
- Inspect and replace parts: Check gaskets, seals and wash arms, and replace worn or damaged parts promptly to prevent leaks and poor results.
- Descale and delime: Where water is hard, mineral buildup forms over time. Use a suitable descaler to keep the machine performing.
- Train staff: Teach correct loading, the right detergents and proper operation, including how to use the dishwasher effectively. Good habits prevent breakdowns.
- Scheduled servicing: Book professional maintenance so technicians can catch issues before they escalate.
- Water temperature and pressure: Make sure incoming water meets the recommended temperature and pressure for optimal cleaning.
- Detergent and rinse aid: Use quality chemicals to the manufacturer's spec to improve cleaning and prevent buildup.
Frequently Asked Questions
Scrape and pre-rinse the dishes, load them by type without overcrowding, dose the correct detergent and rinse aid, select the right cycle, then unload from the bottom rack first. Inspect for cleanliness and rewash anything that is not fully clean before storing.
It depends on your venue and volume. Undercounter machines suit cafes and small kitchens, door-type machines handle busier restaurants, and conveyor or flight-type machines serve large institutional kitchens. Bars with lots of glassware usually add a dedicated glasswasher.
Clean filters and spray arms daily, and wipe out the interior at the end of each day. Descale on a schedule that matches your water hardness, since harder water builds up minerals faster. Book professional servicing periodically to catch wear early.
Spotting and film usually point to incorrect rinse-aid dosing, hard water or low rinse temperature. Check your chemical dosing, consider a water softener if your supply is hard, and confirm the incoming water meets the recommended temperature.
