WJA Training

WJA Safety Awareness (SA)

A prerequisite for all of the WJA modules. This full day classroom based course will deliver fundamental safety and operational messages to new candidates and crucial updates to experienced jetters renewing their jetting certification.

Water Jetting Association (WJA) 

Safety Awareness (SA)

Safety awareness training is essential for all individuals working in the Water Jetting industry, as health and safety are vital concerns.

An organization that has a well-trained and competent staff will have a greater awareness and appreciation of safe working practices when it comes to high pressure water jetting.

The Safety Awareness course (SA) a mandatory one-day classroom-based course that covers all of the main aspects of water jetting operation and safety, including types of water jetting, water pressure and flow rates, risk assessment, and the use of safety gear.

A Safety Awareness course is a prerequisite for all other courses offered by the WJA.

The WJA Safety Awareness (SA) course is a mandatory course that serves as a prerequisite for all other WJA training modules

Key features of WJA Safety Awareness (SA) Course


One Full Day Contact Time


Classroom only instruction


Non-Operational Jetting Card Awarded

Benefits of WJA Training


Candidates will gain a greater understanding of the dangers and safety requirements of high pressure water jetting.

Up To Date

Sucessfully completing the WJA Safety Awareness course every three years ensures important safety and operational updates are received and maintains a valid WJA certification


Candidates will gain a deeper understanding of the jetting principles increasing their ability to carry out high pressure water jetting tasks.


Candidates who successfully complete the course gain a City and Guilds approved certificate and photo card showing their credentials.


Registration & Introduction

Applications & Machines

Effect fo varying pressure/flow at the nozzle – range of jetting machines – configurations & categories (pressure washers / general purpose / medium-heavy duty / UHP / drain &sewer jetters)

Legislation & The WJA Codes Of Practice

Health & Safety at Work Act – WJA Codes of Practice – status, use and recognition by the HSE Management Regulations – RISK Assessment – PPE at Work regulation s- COSH – Employer/employee responsibilities-
Enforcement Powers – other relevant legislation e.g. Environmental Protection Act / Control of Pollution Act.

Jetting Equipment - Nozzles

Jet principles – purpose of nozzles – power of water jet – jet pressure/flow characteristic – jet reaction force.
Types of nozzle – forward facing, fixed & spinning jets, multi-jet fixed & spinning nozzles.

Jetting Equipment - Pumps

Pump configuration – standard piston / plunger pump, positive displacement action, operating features, effects of blockages, variation of plunger sizes. Other pump configurations – diaphragm and intensifier types. Drive arrangements- engine / electric motor, hazardous area equipment. Water supply/delivery features – filtration requirements, boost feed pumps, pulsation dampers, jump-jet. Pressure safety relief
options – relief valve / bursting disc. Pressure gauge features.

Jetting Equipment - Pressure Controls

Dump & dry shut controls – fail-safe / selector versions, direct manual operation / remote operation via electric-pneumatic-hydraulic controls, automatic unloader valve for dry shut, pressure regulators, and automatic off-load engine speed control systems.

Water Jetting Hazards

Hazards arising directly from the water jet – from operational regime – from site environment

Water Jetting Injuries

Effects of impact by high pressure water jet – nature of internal injuries caused – action in event of ajetting injury – awareness of possible absence of visual injury & use of WJA Medical Card.

Personal Protective Equipment

General principles regarding use of PPE, as a last resort; Main body protection – limits on effectiveness
against direct impact of water jet; Protection of head, hands, feet, hearing, respiration; Particular requirements when using UHP.

Operational Procedures

Routine care & inspection – site preparations – preparations for operation – team operation.
Safety points during operation – use of manual jetting gun/lance, tube/pipe/drain cleaning nozzle/lance/ hose combinations & techniques. Safe use of non-standard equipment e.g. tee nozzle.
Site shutdown & anti freeze procedures. Use of DO / DO NOT GUIDE.


Review of course content as above, with opportunity for further discussion prior to Questionnaire.

Don’t Stop at Safety Awareness

The WJA Safety Awareness course is just the beginning of water jetting training, If the candidate is going to perform any water jetting tasks they must complete the appropriate WJA Modules for the jetting operations that they are carrying out. Only once the module is complete will the candidate receive a card with ‘Operational’ status from the WJA.



Adding WJA Modules to WJA Safety Awareness will give jetters operational status in one ore more of these areas of specialism.

Surface Preparation (SP)

Clear floor areas, strip coatings, remove graffiti, and clean industrial equipment the WJA Surface Preparation and Cleaning Module

Tube & Pipe Cleaning (TP)

Learn to safely and effectively clean tube bundles and pipework with the WJA Tube and Pipe Cleaning Module

Drain & Sewer Cleaning (DS)

Understand the safety aspects and learn effective methods to clear blockages, scale, or debris with the WJA Drain and Sewer Cleaning Module

Hydrodemolition (HD)

Recognise the safety considerations and the benfits of hydrodemolition processes in the WJA Hydrodemolition Module

Find out More about WJA Training