Commercial Pass-Through Dishwasher Buying Guide: The Complete UK Guide (2026)
A commercial pass-through dishwasher — also known as an under-counter or hood-type undercounter unit — is the workhorse of mid-volume hospitality kitchens, washing 600–800 plates per hour at 90-second cycles. Unlike glass washers (designed for bar glasses), pass-through units handle heavier loads: dinner plates, pans, cutlery, and ovenware. This guide covers the spec decisions that matter most, the multi-brand sourcing logic, and the range we specify: Halcyon Amika (UK value-trade), Maidaid Evolution (UK reliable), Hobart FX (premium hospitality), Winterhalter UC (German energy-leader), and Meiko UPster.
- Capacity and speed: a standard 500×500 mm rack pass-through at 90-second cycle = 40 racks/hour = 600-800 plates/hour. A 400×400 mm rack (bar glassware) is a different category.
- Water temperature: wash 55-65°C, rinse 82-85°C minimum. The rinse temperature is the sanitisation point — logged daily for HACCP compliance (SI 2002/2677).
- Cycle options: 90 second (full service), 120 second (soiled), 180 second (heavily burnt food). Quick-change chemical + rinse-aid dosing via peristaltic pumps.
- Power requirement: 4.5 kW typical (20A single phase) to 6.5 kW (30A single OR 16A 3-phase). Do NOT assume it will fit your existing circuit.
- Waste options: gravity drain (if floor outlet below machine) or internal/external pump. Pumped units cost £300-£600 more but run far from drain points.
- Water hardness: if mains hardness >7°dH (common in southern UK, Midlands), an internal or external softener is mandatory — removes scale, extends rinse-aid life, improves finish.
- UK price tiers (ex VAT, April 2026): entry pass-through £2,200-£2,500; mid-range with drain pump £2,500-£3,500; pass-through + softener + pump £3,200-£3,800; specialist hood/conveyor £6,000-£12,000+.
- Approvals: BS EN 60335-2-58 (commercial dishwasher safety), UKCA marking. Must retain COSHH datasheets for detergent + rinse-aid; annual operator training per SI 2002/2677.
The single biggest specification error we see is under-sizing. A kitchen that serves 100 covers at lunch and 250 at dinner needs enough dishwashing capacity to hold queue during peak service — a 90-second pass-through at 40 racks/hour can clean 600 plates in a 90-minute service. If you’re turning 250 covers in 75 minutes (high-volume service), you need 500+ plates’ worth of clean stock on the counter. Under-size the machine, and you’re hand-washing pans at the bar.
The second biggest error is skipping the water chemistry. Halcyon Amika, Maidaid Evolution, and Hobart all perform equally well if you feed them clean, soft water and the right detergent. Feed a Winterhalter UC hard mains water, and the rinse seals fail in 18 months — then you’re stuck replacing £800 worth of internals. A softener costs less than one repair.
Craven Cooling stocks Halcyon Amika and Maidaid Evolution as the value-trade standard. We specify Hobart FX for hospitality groups with SLAs, Winterhalter UC when energy and chemical cost matter over 5 years, and Meiko for engineering shops. This guide walks through that logic and the product cards to help you right-size. Browse the full Craven Cooling commercial warewashing range when you’re ready to order.
In this guide
- Key facts and 2026 UK reference numbers
- The three spec decisions that matter most (under-counter vs pass-through vs hood; pumped vs gravity waste; internal vs external softener)
- UK price tiers and what each tier buys you
- Multi-brand sourcing logic — Halcyon, Maidaid, Hobart, Winterhalter, Meiko
- Stocked products at Craven Cooling — verified specs and prices
- Year-one total cost of ownership worked example
- UK compliance checklist
- Use and maintenance checklist
- FAQ — eight buyer objection questions answered
Decision 1: Under-Counter vs Pass-Through vs Hood
The machine type depends on your kitchen layout and covers per service.
| Type | Rack size | Best for covers | Cycle time | Capacity/hour |
|---|---|---|---|---|
| Under-counter (frontload) | 500×500 mm | 20–60 covers/service | 120–180 sec | 20–30 racks/hr (300–450 plates) |
| Pass-through (hood door) | 500×500 mm | 60–250 covers/service | 90–120 sec | 40 racks/hr (600–800 plates) |
| Hood/Conveyor | 500×500 mm or custom | 250–1000+ covers/service | 90 sec on-belt | 60–120 racks/hr (1,200–2,400+ plates) |
Decision 2: Pumped vs Gravity Waste
The waste outlet determines where you can site the machine.
| Waste type | Drain height | Distance from floor outlet | Cost premium |
|---|---|---|---|
| Gravity drain | Machine outlet below floor outlet | Within 1.5 m (downhill) | None — baseline |
| Internal pump | Machine outlet above floor outlet | Up to 2 m away (any direction) | +£400–£600 |
| External pump (hot-fill) | Machine outlet elevated, far from drain | Up to 5 m, over barriers | +£600–£900 |
Decision 3: Internal vs External Softener
Water hardness drives the softener decision. Test your mains water hardness before you order.
| Hardness (°dH) | Region (typical) | Softener required? | Cost impact |
|---|---|---|---|
| <7°dH | Scotland, Wales, Cumbria, north-west England | No | Save £300–£500 |
| 7–14°dH | Midlands, southern England (common) | Yes | +£300–£500 internal softener |
| >14°dH | London, south-east (very hard) | Mandatory | +£500–£800 internal + salt cartridge cost |
Five Types of Commercial Dishwasher
Under-Counter (Frontload)
£1,200–£2,200 ex VAT- Door swings forward
- 500×500 mm racks
- 120–180 sec cycle
- 30 racks/hour max
Pass-Through Hood Door
£2,200–£3,500 ex VAT- Door lifts up over rack
- 500×500 mm racks
- 90–120 sec cycle
- 40 racks/hour — workhorse
Pass-Through Double-Rack
£3,500–£5,000 ex VAT- Two racks in-cycle simultaneously
- 500×500 mm racks
- 80 racks/hour
- High-volume cafés, catering
Conveyor Hood
£6,000–£12,000+ ex VAT- Belt-driven continuous flow
- 90-second on-belt wash
- 60–120 racks/hour
- Large hospitals, universities
Glass Washer (400×400)
£2,500–£3,500 ex VAT- Bar glasses ONLY
- 400×400 mm racks
- Shorter cycles, softer chemistry
- Do not mix with plate dishwashers
UK Pass-Through Dishwasher Buying Tiers (April 2026)
Stocked and Specified Brands: Multi-Brand Sourcing at Craven Cooling
- 500×500 mm rack, pass-through hood door
- 90-second cycle, 40 racks/hour
- Wash 55°C, rinse 82°C min (HACCP logged)
- Internal water softener + salt cartridge
- Drain pump — sits anywhere in kitchen
- Peristaltic detergent + rinse-aid dosing
- 4.5 kW / 20A single phase
- Dimensions: 700 × 600 × 1,400 mm
The complete mid-range solution for UK kitchens in hard-water areas (Midlands, south-east). Drain pump eliminates floor-outlet constraints; internal softener cuts chemical waste by 40%. Right-sized for 100–200 covers per service. Halcyon Amika is UK-assembled, parts are UK-stocked, repair engineers common. The best value in the pass-through category.
View Halcyon AMH95WSD →- 500×500 mm rack, pass-through hood door
- 120-second cycle, 30 racks/hour
- Wash 60°C, rinse 82°C min
- Internal drain pump standard
- No softener (fit external if hard water)
- Peristaltic detergent + rinse-aid dosing
- 4.5 kW / 20A single phase
- Dimensions: 700 × 600 × 1,400 mm
The UK trade workhorse. Maidaid Evolution is bulletproof — every kitchen maintenance company stocks parts, every engineer knows the pinch-points. Slightly longer 120-second cycle than Amika (30 vs 40 racks/hour), but reliability over speed. No internal softener — if you’re in a hard-water area, add an external softener (Craven fit, £400–£600). Best for soft-water Scotland, Wales, or operators who value spares availability over chemical cost.
View Maidaid EVO502 →- 500×500 mm rack, pass-through hood door
- 90-second cycle, 40 racks/hour
- Wash 55°C, rinse 82°C thermostatic
- Drain pump + optional internal softener
- Tank heat recovery — saves 18% energy
- Peristaltic dosing with backup manual override
- 5.5 kW / 30A single OR 16A 3-phase
- Dimensions: 700 × 600 × 1,400 mm
Premium build. Hobart FX costs 30–40% more than Amika but includes heat-recovery tank, 5-year parts warranty, and SLA response (next-day engineer call-out in major cities). Thermostatic rinse means no cold rinse in winter — critical for glass finish and cutlery shine. Specified in hotel groups, private clubs, contract caterers with SLAs. Hobart is the US company (owned by ITW), so support is global.
Enquire Hobart FX series →- 500×500 mm rack, pass-through hood door
- 90-second cycle, 40 racks/hour
- Wash 60°C, rinse 84°C thermostatic
- Drain pump + internal softener standard
- ECO cycle mode (50% energy at low covers)
- Integral oil mist filtration for hood
- 5.0 kW / 16A 3-phase (power-efficient)
- Dimensions: 700 × 600 × 1,400 mm
German engineering. Winterhalter leads on 5-year total cost of ownership in hard-water areas. REQUIRES soft water — the rinse chemistry is unforgiving without it. ECO cycle cuts energy 50% during quiet periods. Integral oil mist filtration eliminates separate hood vent (saves £1,500 on kitchen venting). Specified in universities, contract caterers, and kitchens bid on cost-per-cover. Steeper upfront, but 5-year energy savings of £600–£900 vs Amika.
Enquire Winterhalter UC →- 500×500 mm rack, pass-through hood door
- 90-second cycle, 40 racks/hour
- Wash 63°C, rinse 85°C full thermostatic control
- Drain pump + internal softener (mandatory)
- Closed-loop wash-water recycling (saves water 40%)
- Integral water pre-heater for incoming cold
- Stainless work-surface, reinforced corners
- 5.2 kW / 16A 3-phase
German premium. Meiko is specified in hospitals, universities, large contract caterers, and kitchens with high daily cover counts (500+). Closed-loop water recycling cuts mains-water use 40% — critical in areas with water restrictions. Reinforced build for high-frequency use (1,000+ covers/day). Higher upfront, but 10-year durability story beats competitors on cost-per-cover over time.
Enquire Meiko UPster →- 400×400 mm rack (bar glasses / small plates)
- 120-second cycle, 30 racks/hour
- Wash 60°C, rinse 82°C min
- Internal water softener + salt cartridge
- Gravity drain (requires floor outlet below machine)
- Peristaltic detergent + rinse-aid dosing
- 4.2 kW / 20A single phase
- Compact: 600 × 600 × 1,400 mm
The compact option. 400×400 mm racks fit smaller glasses, side plates, cutlery only — NOT full dinner plates. Maidaid EVO425WS adds internal softener (useful in soft-water areas to hedge against future moves). 30 racks/hour = 450–600 small plates/hour. Right for cocktail bars, small pubs, hotel mini-bars. CRITICAL: This is a different product from the 500×500 mm pass-through. Know which size you need.
View Maidaid EVO425WS →Total Cost of Ownership: Year-One Calculation
A £2,979 Maidaid Evolution EVO502 vs a £3,409 Halcyon Amika AMH95WSD in a kitchen serving 150 covers/lunch, 200 covers/dinner, 5 days/week:
In a soft-water area, Maidaid saves £373 in year one. In a hard-water area, Halcyon Amika with softener costs £373 more upfront but saves £150–£200/year in years 2–5, breaking even by month 27. This is why we ask about hardness before you order.
UK Compliance & Daily Logging Checklist
- BS EN 60335-2-58: Commercial dishwasher safety standard. All units stocked at Craven carry UKCA marking.
- HACCP temperature logging: Rinse temperature 82–85°C logged daily on machine display or chart recorder. Retain records 12 months minimum. SI 2002/2677 Food Safety Act.
- COSHH datasheets: Detergent + rinse-aid datasheets must be on-site and accessible. Annual operator training on hazard symbols, PPE (cut-resistant gloves mandatory), and emergency rinse procedures.
- Electrical certification: Machine must be installed by a Part P electrician (Building Regulations) and certified. Portable RCD (circuit breaker) required if hardwired to domestic-pattern socket.
- Water treatment: If mains hardness >7°dH, softener is mandatory (not optional). Hard water will void machine warranty after 18 months (scale damage).
- Trade effluent consent: Check with your local Water Authority if kitchen waste (grease, food particles) requires pre-treatment via grease trap. Most commercial kitchens do NOT require formal consent for dishwasher drain alone.
- Annual service: Spray arms, seals, heating element inspected annually. Drain pump impeller checked. Estimate £250–£400/year.
- Staff induction: Operators must be trained on cycle selection, rinse-aid top-up, temperature checking, and COSHH hazard response. Document training date.
Installation, Use & Maintenance Checklist
- Delivery & siting: Check door width, height, and depth before delivery. Pass-through hood needs minimum 800 mm clearance above for door lift. Floor must be level (use shims if needed).
- Water inlet: Cold mains inlet 0.5–3 bar pressure. If >3 bar, fit inlet strainer + pressure reducer (£80). Do NOT use hot water inlet — heating element inside machine raises water to 55°C.
- Drain setup: If gravity drain, outlet must be 600 mm BELOW machine base. If wall drain is higher, fit internal pump (Halcyon AMH91D, Maidaid EVO502). Vent pipe to prevent siphoning.
- Electrical: 20A single phase (4.5 kW) OR 16A 3-phase (6.5 kW models). Part P electrician required. Install portable RCD if plug-in.
- Detergent + rinse-aid: Fill at commissioning. Machine dispenses automatically via peristaltic pump (10 ml detergent per cycle, 3 ml rinse-aid). Check levels weekly, fill monthly.
- Softener salt (if fitted): Fill salt cartridge on commissioning. Refill when light glows — typically every 2–3 months. Use food-grade pellets only, not table salt.
- Spray arms + seals: Remove and rinse spray arms monthly. Replace rubber seal if door no longer closes tight (cost £80–£150).
- Temperature checking: Use a calibrated thermometer to verify rinse temperature 82–85°C weekly. Log on chart or note on machine. If below 82°C, call engineer — heating element may be failing.
- Drain pump (if fitted): Empty and rinse pump filter monthly (trap for small bones, foil fragments). Clogged pump = no drain, water sits in tank.
- Annual service: Engineer inspects heating element, seals, pump impeller, and electrical connections. Schedule every 12 months or after 5,000 cycles.
Pre-Rinse: A Separate Buying Decision
Pass-through dishwashers work best with pre-rinsed loads. Heavily soiled plates (dried-on food, grease) need a pre-rinse spray station — this is a separate guide and separate product category. Craven stocks pre-rinse spray units from Halcyon and Hobart. Budget £400–£800. Pre-rinse cycles reduce main-machine cycle time from 180 seconds to 90 seconds, so it saves energy and labour in high-volume kitchens.
Comparing Pass-Through Dishwashers: Spec Table
| Spec | Halcyon Amika AMH95WSD | Maidaid EVO502 | Hobart FX500 | Winterhalter UC-XL | Meiko UPster |
|---|---|---|---|---|---|
| Price (ex VAT) | £3,409 | £2,979 | £4,200–£4,600 | £3,800–£4,400 | £3,900–£4,700 |
| Cycle time (normal) | 90 sec | 120 sec | 90 sec | 90 sec | 90 sec |
| Racks/hour | 40 | 30 | 40 | 40 | 40 |
| Drain pump | Yes (included) | Yes (included) | Yes (included) | Yes (included) | Yes (included) |
| Internal softener | Yes | No (add external) | Optional | Yes | Yes (mandatory) |
| Rinse thermostatic control | On/Off | On/Off | Thermostatic (winter-proof) | Thermostatic | Thermostatic |
| Power (phase) | 4.5 kW / 20A 1-phase | 4.5 kW / 20A 1-phase | 5.5 kW / 30A 1-phase OR 16A 3-phase | 5.0 kW / 16A 3-phase | 5.2 kW / 16A 3-phase |
| Heat recovery | No | No | Yes (tank recovery) | ECO mode (50% in low covers) | Water pre-heater |
| Warranty | 2 years parts + labour | 2 years parts + labour | 5 years parts + SLA support | 3 years parts + SLA support | 3 years parts + SLA support |
| Best for | Hard-water UK, value | Soft-water UK, reliability | Hotel groups, SLA ops | Contract caterers, energy focus | Universities, high-volume |
Related Guides
- Commercial Glass Washer Buying Guide — 400×400 mm racks for bar glasses, beer glasses, and stemware.
- Commercial Bottle Cooler & Back-Bar Fridge Buying Guide — F-Gas, refrigerant choice, capacity planning.
- Commercial Fryer & Warewashing Guide — deep-fat fryers, grease handling, effluent treatment.
A commercial pass-through dishwasher is sized by daily covers and water hardness, not price alone. Halcyon Amika and Maidaid Evolution are the UK trade standards (£2,979–£3,409 ex VAT), delivering 40 racks/hour at 90–120-second cycles. Drain pump is mandatory if your floor outlet is above the machine base; internal softener is mandatory in hard-water areas (7°dH+) to protect seals and cut chemical waste. Hobart FX costs 30% more but includes heat recovery and SLA support; Winterhalter UC leads on 5-year energy cost; Meiko UPster is specified in high-volume contract operations. Craven stocks Halcyon and Maidaid; we specify Hobart, Winterhalter, and Meiko to order. Call 01792 732702 and we'll test your water, check your space, and recommend the right brand.
Frequently Asked Questions
A pass-through dishwasher uses 500×500 mm racks and washes plates, bowls, pans, cutlery, and ovenware at 55–65°C wash, 82–85°C rinse with detergent chemistry for food soil. A glass washer uses 400×400 mm racks and washes bar glasses, beer glasses, and stemware at lower temperatures with gentler detergent chemistry. They are not interchangeable. Do not use a glass washer for kitchen plates (it will not remove food soil and may scratch). Do not use a pass-through for bar glasses (you will scratch the glass). Craven stocks both; order the right one for your application.
In hard-water areas (7°dH+, common in Midlands and south-east England), scale deposits on heating elements and inside seals within 12–18 months if you don't soften the water. Once scale builds, the rinse temperature drops below 82°C (HACCP fails), heating elements fail, and seals crack. Repair cost: £800–£1,500. An internal softener costs £300–£500 upfront and pays for itself in 12–18 months through reduced chemical waste and longer equipment life. Yes, you can add an external softener later, but that's a plumbing job (£600–£800). Specify softening on the order in hard-water areas. Craven tests your hardness for free — call 01792 732702.
Gravity drain works only if your floor drain outlet is lower than the machine outlet (roughly 600 mm below the base). If the drain is level with or above the machine, you need a pump. Pumped units cost £400–£600 more but eliminate floor works and site constraints. Halcyon Amika AMH95WSD and Maidaid EVO502 both include drain pumps as standard. If space is tight or drain location is uncertain, order a pump unit — you cannot add it later (requires internal plumbing access).
A 4.5 kW unit (Halcyon Amika, Maidaid EVO502) needs 20A single phase (or 13A plug with portable RCD). A 5.5–6.5 kW unit (Hobart FX) needs 30A single phase OR 16A 3-phase (better for heat-recovery models). Always have a Part P electrician install — do not DIY. If you're in an older kitchen with 13A sockets only, the electrician will need to run a new radial circuit from the fuse board (cost £400–£800). Check your circuit capacity before ordering; undersized circuits will trip frequently under load.
Annual service is standard (£250–£400). The engineer inspects spray arms, seals, heating element, electrical connections, and pump impeller. In high-use kitchens (500+ covers/day), service every 6 months is recommended. You should also: refill detergent + rinse-aid monthly, check rinse temperature weekly with a calibrated thermometer, rinse spray arms monthly, and empty pump filters after every service session (small bones and foil fragments clog the drain). If you log rinse temperatures daily as per HACCP SI 2002/2677, you'll spot heating failures early (temperature drops below 82°C).
No. Do NOT connect hot mains water to a pass-through dishwasher. The machine has an internal heating element that raises cold mains water (5–15°C) to wash temperature (55–65°C). If you supply pre-heated water (40–60°C), the heating element cannot regulate the temperature — rinse temperature will exceed safe limits (above 85°C) or overshoot the temperature sensor, causing scaling. Always use cold mains inlet only. The heating element is sized for cold water rise. If you want to cut energy, specify a model with heat recovery (Hobart FX) or ECO mode (Winterhalter UC).
Stop using the machine and call an engineer. Below 82°C, the rinse cycle does not sanitise adequately — you will fail a food-safety audit (SI 2002/2677 requires 82°C minimum). Common causes: scale on the heating element (if hard water, add softener), heating element failure (age 5+ years), or thermostat drift (calibration needed). Do not adjust the thermostat yourself. A service engineer can test and repair, typically in 1–2 hours (cost £150–£300). If you log temperatures daily, you'll spot the drop early and avoid a shutdown mid-service.
Choose by your priority: Halcyon Amika if you want internal softener + drain pump in a hard-water area at good value (£3,409). Maidaid Evolution if you want UK reliability and parts availability in a soft-water area (£2,979). Hobart FX if you're a hotel group or high-SLA operation and want heat recovery + 5-year warranty (£4,200+). Winterhalter UC if you're bid on cost-per-cover and want the lowest 5-year operating cost, but you must have soft water (£3,800+). Meiko UPster if you're running 500+ covers/day and want the lowest 10-year cost and water recovery (£3,900+). Craven stocks Halcyon and Maidaid; we order Hobart, Winterhalter, and Meiko to spec. Call 01792 732702 and describe your kitchen — we'll recommend the right brand for your covers, hardness, and budget.
