Independent Technical Reference
Cold-water pressure washer pumps, pressure, flow, nozzles and buyer checks
This profile explains cold-water washer boundaries, pump and drive formats, working pressure versus maximum pressure, flow, inlet temperature, spray equipment and site verification.
First published 2026-08-09 · Last verified 2026-08-09
This independent category reference is not operating, surface, chemical, water-system or safety advice. High-pressure jets can cause severe injury and damage. Confirm the current manual, exact product number, rated accessories, inlet water, utilities, PPE, exclusion zone and local rules before procurement or use.
| Fact | Technical reference | Scope boundary |
|---|---|---|
| Category boundary | No integrated water-heating system | Named products; external heaters are excluded. |
| Inlet temperature | Cold-water naming does not create one universal inlet limit | Exact machine and operating mode. |
| Comparison basis | Working pressure and flow must be compared together | Named configurations and source methods. |
| Buyer verification | Match water supply, pressure, flow, pump drive, hose, gun, lance and nozzle | Quoted regional product and actual site. |
WCB explanatory visual
An original system map synthesized from reviewed operator manuals. It explains functional flow, not a universal machine architecture.
Inlet, filter and feed hose
Provides water within flow, pressure, cleanliness and temperature limits.
Electric motor or combustion engine
Supplies mechanical power to the pump.
Pump, unloader and protection system
Raises and regulates water pressure.
Rated hose, trigger gun, lance and nozzle
Transfers water and forms the selected spray pattern.
Work-zone, drainage and pressure relief
Controls contaminated water and leaves the system in its prescribed safe state.
Equipment taxonomy
These formats describe operator relationship and task scale. None is a universal winner.
Official Kärcher product image of a framed mobile electric cold-water format.
Buyer focusUse the format as a starting point, then compare the operating envelope, utilities, duty cycle, operator workflow, accessory system and the exact configured machine.
Official image sourceSpecification dictionary
| Metric | Purchasing meaning | Reporting boundary | Comparison caution |
|---|---|---|---|
| Working pressure | Nominal pressure during the stated operating condition | Working, maximum and permissible pressure can differ | Do not compare maximum pressure with another model's working pressure. |
| Delivery rate | Water volume available for rinsing and soil transport | Rated and maximum values may use different conditions | Flow and pressure must be compared as a pair. |
| Inlet water limit | Defines supply-water and seal boundary | Temperature and supply mode are model-specific | Do not infer hot-water compatibility from a metal pump head or commercial label. |
| Nozzle and spray pattern | Controls jet angle, local impact and coverage | Included and optional nozzle sets differ | A rotary nozzle changes local impact without changing pump rating. |
| Power and duty | Supports circuit, generator, fuel and operating-window planning | Motor input, engine power and pump speed are not directly comparable | Power alone does not establish duty cycle. |
Evidence + WCB interpretation
Official application evidence does not establish automatic suitability. Each row shows what still needs to be tested.
Official Nilfisk agricultural application image; biosecurity, animal-area and wastewater controls require site review.
Buyer focusTreat the photographed setting as context only. Validate utilities, surface compatibility, operating space, operator controls, environmental conditions and the planned work process on site.
Official image sourceSensitive seals, bearings, electronics, coatings and labels should be mapped before the trial.
Surface strength, water intrusion, rebound and drainage may matter more than maximum pressure.
Biosecurity, contaminants and wastewater should define the process before equipment ranking.
System component map
Component families are labels only. No component link or cross-model compatibility is claimed.
WCB diagram separating inlet, pump drive, hose, gun, lance, nozzle and runoff checks. It does not establish part compatibility.
Buyer focusBefore substitution or service work, match the current manual, model and serial range, part number, physical interface, approved material or chemistry, and electrical configuration.
Evidence sourceskarcher-hd615, nilfisk-mc5m, stihl-re150, bosch-ghp575x, lavor-lite2w, oertzen-c230
Supplies and protects the pump.
Generates and regulates high-pressure flow.
Drives the pump.
Contains flow and gives the operator discharge control.
Forms the cleaning jet at the surface.
Verified relationships
Representative, not exhaustive. A link means the official source connects the named brand and model; it does not establish a factory, OEM or component-supplier relationship.
| Brand | Model | Subtype | Official specification reference | Market scope | Verified | Source |
|---|---|---|---|---|---|---|
| Kärcher | HD 6/15 M | Mobile electric cold-water washer |
| Kärcher regional professional page | 2026-08-09 | karcher-hd615 |
| Nilfisk | MC 5M-200/1000 | Medium-class electric cold-water washer |
| Nilfisk official specification | 2026-08-09 | nilfisk-mc5m |
| STIHL | RE 150 PLUS | Compact electric pressure washer |
| STIHL official instruction manual | 2026-08-09 | stihl-re150 |
| Bosch Power Tools | GHP 5-75 X | Compact professional electric washer |
| Bosch Professional India page | 2026-08-09 | bosch-ghp575x |
| Lavor | LITE 2W 1510 XP | Electric professional cold-water washer |
| Lavor professional page | 2026-08-09 | lavor-lite2w |
| Oertzen | C230-15 E | Industrial electric cold-water washer |
| Hako-hosted Oertzen product page | 2026-08-09 | oertzen-c230 |
| Lavor | Thermic 9 L | Petrol-engine cold-water washer |
| Lavor official professional data sheet | 2026-08-09 | lavor-thermic9 |
WCB decision support
No composite score or brand ranking. Each row identifies a comparison trap and the next verification action.
Engineering validation
This checklist narrows verification work; it is not a compatibility guarantee or repair manual.
Hose, gun, lance, coupling and nozzle must contain the machine output.
Required actionVerify every component part number and rating against the exact model.
Insufficient or unsuitable inlet water can affect operation and pump protection.
Required actionMeasure available flow, pressure and temperature and confirm filtration.
Drive configuration changes circuit, exhaust, fuel and operating controls.
Required actionMatch voltage, phase, protective device, generator or engine-use plan.
Jet impact can damage surfaces and runoff may carry regulated contaminants.
Required actionApprove a test area, exclusion zone and disposal path before work.
Standards boundary
JurisdictionInternational
Version2021
ApplicabilitySafety of covered non-traction high-pressure cleaners within the stated standard scope.
JurisdictionInternational
Version2018
ApplicabilityMethods for describing characteristic performance parameters of covered high-pressure cleaners.
Technical developments
IEC published edition 5.0 of IEC 60335-2-79 and revised the covered high-pressure-cleaner scope.
IEC published IEC 62885-5 for characteristic performance parameters of high-pressure cleaners and steam cleaners.
Evidence record
First published 2026-08-09 · Last verified 2026-08-09 · Last material modification 2026-08-09
International Electrotechnical Commission
Open official sourceAccessed 2026-08-09 · Published 2021-06-23
International Electrotechnical Commission
Open official sourceAccessed 2026-08-09 · Published 2018-08-29
Kärcher
Open official sourceAccessed 2026-08-09
Nilfisk
Open official sourceAccessed 2026-08-09
STIHL
Open official sourceAccessed 2026-08-09
Bosch Professional
Open official sourceAccessed 2026-08-09
Lavor
Open official sourceAccessed 2026-08-09
Hako / Oertzen
Open official sourceAccessed 2026-08-09
Lavor
Open official sourceAccessed 2026-08-09