420X4
420X4 — Electric Driven Oil Fired Hot Water Pressure Washer
BUILT FOR SERIOUS OPERATORS.
Alkota 420X4 is an industrial-grade hot water cleaning system engineered in South Dakota by Alkota and built for the demanding conditions of UK commercial and industrial operators. Delivering 138 bar (2000 PSI) at 13.2 L/min (3.5 GPM), it features Alkota's signature heavy-gauge welded chassis and precision-engineered oil bath crankcase | triplex ceramic plunger.
Built for intensive continuous duty, the Alkota 420X4 combines high-efficiency heat exchange with industrial-grade mechanical components. Alkota's proprietary coil technology features a hydro-insulated cold-water wrap that protects operators, pre-heats incoming water, and eliminates thermal shock — backed by a 7-year warranty.
Oil Bath Crankcase
Oil-bath crankcase and ceramic plungers running at lower RPM for cooler, vibration-damped longevity.
Vertical Schedule 80 Coil
Hydro-insulated cold water wrap pre-heats water, protects operators, and eliminates thermal coil stress.
7-Year Coil Warranty
The benchmark in industrial heating reliability. Alkota Schedule 80 coils are guaranteed for 7 years.
Welded Steel Chassis
Heavy-gauge welded structural steel frame with powder coat finish built to survive demanding site environments.
Full Technical Specifications
| Operating Pressure | 138 BAR(2000 PSI) |
| Water Flow Rate | 13.2 L/min(3.5 GPM) |
| Max Temperature | 98°C(208°F) |
| Thermal Output | 350,000 BTU/hr(102.6 kW thermal) |
| Electrical Supply | 230 v / 1-Phase / 30A |
| Drive Unit | Electric Motor · 3.7 kW · (5 HP) |
| Heating Fuel | Kerosene, #1, #2 Diesel |
| Fuel Tank Capacity | 30.3 L(8 gal) |
| Fuel Consumption | 9.5 L/hr(2.5 gal/hr) |
| Operating Weight | 247 kg(545 lbs) |
| Dimensions (L×W×H) | 1168 × 787 × 1245 mm |
| Chassis / Mobility | 4-Wheel Heavy-Duty Pneumatic Chassis |
| Pump Architecture | Oil Bath Crankcase · Triplex Ceramic Plunger |
| Heating Coil System | Vertical Schedule 80 |
| Coil Pipe Length | 38 m(126 ft) |
| Duty Rating | Continuous Industrial Duty (6–10 hrs/day) |
| Certifications | ETL certified to UL-1776 · CSA Certified |
| Coil Warranty | 7 Years (Hydro-Insulated) |
Primary Industrial Use Cases
Standard Engineering Features
Factory-Available Options
Engineering Documentation
Official Alkota Factory Publications
SUPPORTING EQUIPMENT & ACCESSORIES
Every component below is verified against factory schematics, hydraulic output curves, or application guidelines for the Alkota 420X4.
General Pump TS2021 Triplex Plunger Pump
The benchmark triplex plunger pump used across Alkota heavy-duty hot and cold water pressure washers. Features forged brass manifold, solid ceramic plungers, unitised stainless steel inlet/discharge valves, and heavy die-cast anodised aluminium crankcase.
Alkota USA factory parts manual (Section 4: Pump Assembly). Model 420X4 uses General Pump TS2021 at 1450 RPM.
SCH80 COIL X4
Backed by Alkota 7-year coil warranty.
Schedule 80 ASTM A53 seamless carbon steel hydro-insulated coil. 1/2" ID, 130ft length with horizontal pancake bottom.
BECKETT CLEANCUT FUEL PUMP
Genuine replacement spare part.
Beckett CleanCut burner installation on 230V / 1PH X4 electrical control pack.
BECKETT IGNITION ELECTRODES
Genuine replacement spare part.
OEM twin porcelain glazed high-voltage electrode assembly for Alkota oil burners.
UNLOADER VB9
Genuine replacement spare part.
PA VB9 flow-actuated unloader valve matches 420X4 hydraulic circuit (20 LPM @ 200 BAR).
HP HOSE 15M 38
Genuine replacement spare part.
Standard 3/8" QC high-pressure outlet with 400 BAR burst pressure rating and 150°C thermal limit.
SUTTNER ST2300 GUN
Genuine replacement spare part.
Suttner easy-pull trigger gun with 3/8" M inlet and 1/4" F outlet. Rated 310 BAR / 150°C.
General Pump TS2021 Complete Packing Seal Kit
OEM replacement seal kit for TS2021 pump. Contains high and low pressure V-packings, brass support rings, and O-rings for complete 3-cylinder service.
OEM Cross-Reference: General Pump TS2021 Complete Packing Seal Kit is specified for Alkota 420X4, 430XH4, 4358
TS2021 Solid Ceramic Plunger Cylinder (Pack of 3)
Set of 3 precision-ground solid ceramic plungers. Resists thermal shock, chemical corrosion, and abrasive wear.
OEM Cross-Reference: TS2021 Solid Ceramic Plunger Cylinder (Pack of 3) is specified for Alkota 420X4, 430XH4, 4358
Beckett AFG Industrial Diesel Burner Assembly
Factory original Beckett AFG oil burner engineered specifically for Alkota vertical Schedule 80 combustion chambers. Features solid-state electronic ignitor, CleanCut fuel pump with solenoid shut-off, and high-velocity blower wheel.
OEM Cross-Reference: Beckett AFG Industrial Diesel Burner Assembly is specified for Alkota 420X4, 430XH4, 4358, 5305A
Beckett Solid-State Electronic Ignition Transformer (240V)
High-voltage electronic ignitor for rapid, continuous spark across burner electrodes. Sealed moisture-resistant epoxy casing.
OEM Cross-Reference: Beckett Solid-State Electronic Ignition Transformer (240V) is specified for Alkota 420X4, 430XH4, 4358, 216X4
Alkota Burner Ignition Electrode Pair with Lead Wires
Matched pair of high-alumina glazed ceramic ignition electrodes with stainless spark rods and silicone high-tension insulated lead wires.
OEM Cross-Reference: Alkota Burner Ignition Electrode Pair with Lead Wires is specified for Alkota 420X4, 430XH4, 4358, 216X4, 5305A
Suntec A2VA Fuel Pump with 240V Solenoid Shut-Off
Single-stage oil burner fuel pump with integral pressure regulator and instantaneous 240V solenoid cut-off valve to prevent burner smoking on shutdown.
OEM Cross-Reference: Suntec A2VA Fuel Pump with 240V Solenoid Shut-Off is specified for Alkota 420X4, 430XH4, 4358, 5305A
Delavan 1.50 GPH 80°A Solid Cone Oil Burner Nozzle
Precision sintered-filter atomising oil burner nozzle. Produces uniform hollow-cone spray pattern for complete clean combustion in Alkota heating coils.
OEM Cross-Reference: Delavan 1.50 GPH 80°A Solid Cone Oil Burner Nozzle is specified for Alkota 420X4, 430XH4
Alkota Schedule 80 ASTM A53 Heating Coil — 200/300 Series
Continuous-wound Schedule 80 ASTM A53 carbon steel heating coil. Hydrostatically tested to 10,000 PSI. Uniquely engineered with cold-rolled continuous spiral geometry for maximum heat transfer and zero weld seam fatigue.
OEM Cross-Reference: Alkota Schedule 80 ASTM A53 Heating Coil — 200/300 Series is specified for Alkota 216X4, 31105, 420X4
Alkota High-Density Ceramic Bottom Insulation Disc
Pre-molded ceramic fiber refractory bottom pan disc. Withstands direct flame exposure up to 1260°C and prevents heat transfer to machine chassis.
OEM Cross-Reference: Alkota High-Density Ceramic Bottom Insulation Disc is specified for Alkota 216X4, 420X4, 430XH4, 4358
Alkota Easy-Pull Industrial Trigger Gun
Proprietary fatigue-reducing trigger gun designed specifically for 8-hour commercial wash shifts. Features light trigger hold-open force, impact-resistant composite housing, and stainless steel ball and seat.
OEM Cross-Reference: Alkota Easy-Pull Industrial Trigger Gun is specified for Alkota 420X4, 430XH4, 4358, 216X4, 31105, 5305A
Suttner ST-1500 Industrial High-Pressure Spray Gun
Industry benchmark linear trigger gun built with solid forged brass body, stainless valve needle, and unitised trigger lock mechanism.
OEM Cross-Reference: Suttner ST-1500 Industrial High-Pressure Spray Gun is specified for Alkota 420X4, 430XH4, 4358
10m 3/8" Single-Wire Braided High-Pressure Hose (300 BAR)
High-tensile steel wire braided pressure hose with oil-resistant synthetic rubber core and abrasion-resistant outer jacket. Includes heavy-duty molded bend restrictors.
OEM Cross-Reference: 10m 3/8" Single-Wire Braided High-Pressure Hose (300 BAR) is specified for Alkota 420X4, 430XH4, 216X4, 4305XD4
15m 3/8" Non-Marking Gray Commercial Wash Hose
Special non-marking gray rubber jacket designed specifically for food processing plants, vehicle showrooms, and concrete forecourts where black marks are prohibited.
OEM Cross-Reference: 15m 3/8" Non-Marking Gray Commercial Wash Hose is specified for Alkota 420X4, 430XH4, 31105
1000mm Insulated Molded Grip Stainless Steel Lance
Seamless 316 stainless steel high-pressure wand with ergonomic ribbed thermal grip for operator heat protection during continuous hot water washing.
OEM Cross-Reference: 1000mm Insulated Molded Grip Stainless Steel Lance is specified for Alkota 420X4, 430XH4, 4358, 216X4
Alkota QC Color-Coded Stainless Nozzle 4-Pack (Size 04)
Set of 4 hardened stainless steel quick-connect tips: Red (0° blasting), Yellow (15° stripping), Green (25° washing), White (40° rinsing).
OEM Cross-Reference: Alkota QC Color-Coded Stainless Nozzle 4-Pack (Size 04) is specified for Alkota 420X4, 430XH4, 4305XD4
Suttner ST-357 Rotating Turbo Jet Nozzle (Size 04)
High-RPM zero-degree rotating pencil jet that combines the aggressive impact of a 0° blast with the wide coverage of a 25° fan.
OEM Cross-Reference: Suttner ST-357 Rotating Turbo Jet Nozzle (Size 04) is specified for Alkota 420X4, 430XH4, 216X4
VRT3-310 Trapped-Pressure Unloader Valve with Microswitch
Heavy forged brass unloader valve with internal bypass and electric microswitch for automatic timed total-stop burner/motor shutdown.
OEM Cross-Reference: VRT3-310 Trapped-Pressure Unloader Valve with Microswitch is specified for Alkota 420X4, 430XH4, 4358
Alkota High-Pressure Safety Burst Disc 5000 PSI
Certified rupture disc safety valve that provides instant positive overpressure relief if the primary unloader valve binds or freezes.
OEM Cross-Reference: Alkota High-Pressure Safety Burst Disc 5000 PSI is specified for Alkota 420X4, 430XH4, 4358, 5305A
Brass Thermal Relief Valve 60°C (1/2" MPT)
Automatic thermal dump valve that opens to eject hot recirculating bypass water before pump packings overheat during closed-gun idling.
OEM Cross-Reference: Brass Thermal Relief Valve 60°C (1/2" MPT) is specified for Alkota 420X4, 430XH4, 216X4, 4305XD4
Alkota Adjustable Dial Thermostat (0°C – 130°C)
Precision bulb-and-capillary thermostat with front-panel rotary temperature selector dial. Controls burner ignition solenoid for exact water temperature regulation.
OEM Cross-Reference: Alkota Adjustable Dial Thermostat (0°C – 130°C) is specified for Alkota 420X4, 430XH4, 4358, 216X4, 5305A
General Pump Magnetic Reed Flow Switch (3/8" MPT)
In-line safety flow switch that prevents burner combustion unless water is actively flowing through the heating coil.
OEM Cross-Reference: General Pump Magnetic Reed Flow Switch (3/8" MPT) is specified for Alkota 420X4, 430XH4, 4358, 216X4
Alkota 500-Hour / Annual PPM Service Kit — 200 Series
Complete scheduled maintenance kit containing fuel filter, water strainer mesh, Delavan burner nozzle, ignition electrode pair, pump oil, and high-pressure unloader rebuild O-rings.
OEM Cross-Reference: Alkota 500-Hour / Annual PPM Service Kit — 200 Series is specified for Alkota 216X4, 420X4
Mosmatic DL-UHD 46 Heavy-Duty Flat Surface Cleaner (18")
Swiss-engineered commercial rotary surface cleaner built with 18" heavy-gauge stainless steel deck housing, four stainless caster wheels, high-RPM dual-bearing carbide swivel union, and lance mounting bracket. Eliminates zebra striping on concrete forecourts.
OEM Cross-Reference: Mosmatic DL-UHD 46 Heavy-Duty Flat Surface Cleaner (18") is specified for Alkota 420X4, 430XH4, 4358, TRAILER-SINGLE
Mosmatic DL-UHD 43 Stainless Surface Cleaner (12")
Compact 12" stainless steel surface cleaner for tight walkways, fuel islands, and commercial kitchen floor sanitisation.
OEM Cross-Reference: Mosmatic DL-UHD 43 Stainless Surface Cleaner (12") is specified for Alkota 420X4, 430XH4
Mosmatic UC-E Stainless Undercarriage Vehicle Wash Rig
High-clearance vehicle chassis cleaner with 4x high-velocity rotor arms and low-profile caster wheels. Rolls smoothly under trucks, plant machinery, and council fleets to blast road salt and mud.
OEM Cross-Reference: Mosmatic UC-E Stainless Undercarriage Vehicle Wash Rig is specified for Alkota 420X4, 430XH4, 4358, TRAILER-SINGLE
Mosmatic DGV High-RPM Live Swivel Union (3/8" NPT)
Maintenance-free Swiss stainless steel live swivel union with tungsten-carbide mechanical face seals. Eliminates hose twisting at the spray gun inlet and reduces operator wrist fatigue.
OEM Cross-Reference: Mosmatic DGV High-RPM Live Swivel Union (3/8" NPT) is specified for Alkota 420X4, 430XH4, 4358, 216X4
Mosmatic TurboKing 6" High-Impact Rotary Jet Head
Heavy handheld circular blaster housing a twin-jet high-RPM rotor head for intensive concrete curb, brickwork, and graffiti stripping.
OEM Cross-Reference: Mosmatic TurboKing 6" High-Impact Rotary Jet Head is specified for Alkota 420X4, 430XH4, 4305XD4
Mosmatic Commercial Foam Cannon 2.5L System
Industrial high-expansion foam lance with calibrated air induction and stainless mesh aerator. Delivers thick clinging detergent foam for fleet degreasing.
OEM Cross-Reference: Mosmatic Commercial Foam Cannon 2.5L System is specified for Alkota 420X4, 430XH4, 216X4
Steel Eagle SE-16 Classic Commercial Surface Cleaner (16")
Professional commercial rotary surface cleaner with heavy spun aluminium deck, greaseable dual-bearing swivel union, and twin 25° wash nozzles. Built for multi-hour car park washing.
OEM Cross-Reference: Steel Eagle SE-16 Classic Commercial Surface Cleaner (16") is specified for Alkota 420X4, 430XH4, 216X4
Dual Pumps BM25 High-Pressure Bypass Manifold Assembly
UK-assembled brass bypass manifold unit with integrated thermal safety port, pressure gauge take-off, and chemical injection check valve.
OEM Cross-Reference: Dual Pumps BM25 High-Pressure Bypass Manifold Assembly is specified for Alkota 420X4, 4305XD4
Dual Pumps Stainless Glycerine Pressure Gauge (0–400 BAR)
Stainless steel case glycerine-filled pressure gauge with bottom 1/4" BSP connection. Liquid dampening eliminates pointer vibration for accurate system monitoring.
OEM Cross-Reference: Dual Pumps Stainless Glycerine Pressure Gauge (0–400 BAR) is specified for Alkota 420X4, 430XH4, 4358, 216X4
Dual Pumps Venturi Chemical Dosing Injector Assembly
Adjustable high-pressure downstream chemical injector with metering knob and clear braided suction hose with brass weighted filter foot.
OEM Cross-Reference: Dual Pumps Venturi Chemical Dosing Injector Assembly is specified for Alkota 420X4, 430XH4, 216X4
Need assistance selecting parts or accessories for model 420X4?
Our UK engineering team verifies nozzle orifices, unloader ratings, and chemical injection ratios before dispatch to ensure 100% operational compatibility.
Hog Heaven — 2,400-Head Swine Facility Deep Clean
See how extreme industrial cleaning challenges push professional Alkota equipment beyond ordinary pressure washing. The inaugural Mess Quest episode: tackling massive biological muck, encrusted manure, and biosecurity sanitisation across a 2,400-head swine finishing barn.
SPECIFY THE 420X4.
Connect directly with Alkota UK application engineers to verify flow rates, power supplies, wash bay layouts, or trailer integration. We provide direct factory quotations and technical advice.