Interpump WS201 Pressure Washer Pump 200 Bar 15LPM 1450RPM

Product Overview

The Interpump WS201 Pressure Washer Pump is a professional industrial triplex plunger pump designed for demanding cleaning applications requiring reliable continuous performance. Delivering up to 200 Bar operating pressure with a flow rate of 15 litres per minute at 1450RPM, the WS201 is part of the highly respected Interpump 47 Series range used throughout industrial, agricultural, commercial, and food production cleaning environments.

Built with a heavy-duty brass pump manifold, solid ceramic plungers, and precision-engineered internal components, the WS201 is engineered for durability, smooth operation, and long service life. Its low-speed 1450RPM design helps reduce heat build-up and wear, making it ideal for industrial pressure washers, static washdown systems, motor pump units (MPU), and hot or cold pressure washer installations.

The Interpump WS201 is widely recognised for its reliability, serviceability, and excellent spare parts support, making it one of the most popular industrial pressure washer pumps available.

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Key Features

• Genuine Interpump WS201 industrial pressure washer pump
• Heavy-duty 47 Series triplex plunger pump
• Produces up to 200 Bar operating pressure
• 15 litres per minute flow rate
• Low-speed 1450RPM operation for longer service life
• Durable brass pump head construction
• Solid ceramic plungers for improved durability
• Suitable for continuous industrial applications
• Compatible with hot and cold pressure washer systems
• Excellent availability of spare parts and service kits
• Smooth and reliable pump performance
• Ideal for industrial, agricultural, and commercial cleaning equipment

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Technical Specifications

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Recommended Nozzle Size

For systems operating at 200 Bar with a flow rate of 15 litres per minute, it is recommended to use a Size 045 lance nozzle to achieve the correct pressure and flow performance.

Using the correct nozzle size helps:

• Maintain correct operating pressure
• Protect the pump from excessive strain
• Improve cleaning performance
• Reduce unnecessary wear on pump components
• Ensure proper unloader valve operation

Incorrect nozzle sizing can lead to pressure loss, overheating, poor cleaning performance, or premature pump wear.

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Industrial Applications

The Interpump WS201 is suitable for a wide range of professional cleaning systems including:

• Industrial pressure washers
• Agricultural cleaning equipment
• Commercial vehicle wash systems
• Food industry washdown systems
• Static washdown installations
• Factory and warehouse cleaning
• Motor pump units (MPU)
• Hot water pressure washers
• Cold water pressure washers
• Heavy-duty commercial cleaning systems

Its low-speed design and industrial-grade construction make it ideal for demanding environments where reliability and long operating life are essential.

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Recommended Service Kits & Spare Parts

Regular servicing is essential to maintain performance, maximise pump life, and reduce costly downtime. Flowjet Cleaning Equipment supplies a full range of genuine Interpump repair kits and maintenance parts suitable for the WS201 pump.

Popular service kits include:

Kit 1 – Valve Kit

Contains all 6 pump valves required for servicing and restoring pump performance.

Kit 2 – Oil Seal Kit

Contains the oil seals for all 3 pistons and is commonly used during routine pump maintenance and rebuilds.

Kit 220 – Hot Water Kit

Designed specifically for hot water pressure washer applications using the WS201 pump.

Kit 28 – Piston Repair Kit

A popular repair kit containing all seals and brass collars required for one piston assembly.

Kit 69 – Pump Seal Kit

Complete pump seal kit designed for preventative maintenance and routine pump servicing.

Using genuine Interpump service kits helps maintain pressure output, improve reliability, and extend the working life of the pump.

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Common WS201 Pump Repairs

In some cases, the Interpump WS201 pump can develop leaks caused by cracked or damaged ceramic pistons. This can happen due to heavy use, freezing conditions, dry running, or normal long-term wear.

If a ceramic piston becomes damaged, replacing it quickly can help prevent further seal wear, pressure loss, and internal pump damage.

Ceramic Piston Replacement

• Genuine Interpump ceramic piston
• Part Number: 47.0404.09
• Suitable for Interpump WS201 47 Series pumps
• Helps resolve leaks caused by damaged ceramic pistons
• Ideal during pump rebuilds and major servicing

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WS201 Pump Maintenance Advice

For maximum reliability and pump lifespan, it is recommended that the pump oil is replaced every 6 months minimum, particularly on machines used heavily or operating continuously in industrial environments.

Routine maintenance should also include:

• Checking pump oil level and condition
• Inspecting seals for leaks or wear
• Monitoring valves and ceramic plungers
• Replacing worn seals before failure occurs
• Ensuring the pump has a clean and adequate water supply

Preventative maintenance significantly reduces wear and helps maintain consistent cleaning performance.

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Why Choose the Interpump WS201?

Interpump pumps are recognised worldwide for their engineering quality, reliability, and long operating life. The WS201 remains one of the most popular industrial pressure washer pumps thanks to its excellent balance of pressure, flow rate, durability, and straightforward servicing.

Its low-speed 1450RPM operation reduces stress on internal components, while the heavy-duty brass manifold and solid ceramic plungers provide excellent durability in demanding industrial environments.

Whether replacing an existing pump or building a new pressure washer system, the Interpump WS201 delivers dependable professional performance backed by excellent spare parts availability and long-term service support.

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Frequently Asked Questions

What pressure does the Interpump WS201 produce?

The Interpump WS201 delivers up to 200 Bar maximum operating pressure.

What flow rate does the WS201 provide?

The WS201 produces a flow rate of 15 litres per minute.

What nozzle size should be used with the WS201?

For systems operating at 200 Bar and 15LPM, a Size 045 lance nozzle is recommended.

Is the WS201 suitable for continuous industrial use?

Yes, the WS201 is designed for professional continuous-duty cleaning applications.

What speed does the WS201 operate at?

The pump operates at 1450RPM which helps reduce wear and extend service life.

Can I get service kits and spare parts for the WS201?

Yes, Flowjet Cleaning Equipment supplies seal kits, valve kits, piston repair kits, ceramic pistons, and general servicing parts for the WS201.

Is the WS201 suitable for hot water pressure washers?

Yes, the WS201 can be used on hot water systems when fitted with the correct hot water service kits such as Kit 220.

How often should the oil be changed?

It is recommended that the pump oil is replaced every 6 months minimum, especially on heavily used industrial machines.

What causes leaks on a WS201 pump?

Leaks can be caused by worn seals, damaged valves, or cracked ceramic pistons. Damaged ceramic pistons can be replaced using genuine Interpump part number 47.0404.09.

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Order Now

Buy the genuine Interpump WS201 Pressure Washer Pump online from Flowjet Cleaning Equipment. We supply industrial pressure washer pumps, service kits, spares, accessories, and technical support throughout the UK.

For compatibility advice, servicing information, or spare parts assistance, contact our experienced team today.

Flowjet Cleaning Equipment LTD
Unit 4, Gatebeck Farm
Gatebeck, Kendal
LA9 7FP
United Kingdom

Telephone: 015395 66193
Email: sales@flowjet.co.uk