What is the difference between a Level 1 and Level 2 water jetting operator certificate?

A Level 1 water jetting certificate qualifies an operator to carry out high-pressure water jetting tasks under supervision, while a Level 2 certificate qualifies an individual to supervise and take overall responsibility for jetting operations. In short, Level 1 is the hands-on operative qualification, and Level 2 is the supervisory one. The two levels are not interchangeable, and most industry safety frameworks require both to be present on site during live operations. The sections below walk through exactly what each certificate covers, how you earn them, and which one applies to your role.

What skills and tasks does a Level 1 water jetting certificate cover?

A Level 1 certificate demonstrates that an operator can safely set up, operate, and shut down high-pressure water jetting equipment at pressures typically ranging from 500 to 3000 bar (7,250 to 43,511 PSI) in an industrial environment. It focuses on the practical, hands-on skills needed to perform jetting tasks correctly and safely under the direction of a qualified supervisor.

The core competencies covered at Level 1 centre on hazard awareness and equipment handling. Operators must understand the risks associated with high-pressure water jetting and know how to control them effectively. Key practical skills assessed at this level include:

• Correct selection, inspection, and connection of hoses, lances, and jetting nozzles
• Operating equipment within its rated parameters
• Following permit-to-work and lock-out/tag-out procedures
• Using personal protective equipment appropriate for high-pressure environments
• Responding to equipment malfunctions and executing emergency stop procedures
• Communicating clearly with the supervising Level 2 operative throughout the task

Level 1 training does not cover risk assessment, method statement preparation, or the broader site management responsibilities that fall to a supervisor. The certificate confirms that the holder is competent to carry out directed jetting work, not to plan or lead it independently.

What additional responsibilities does a Level 2 certificate unlock?

A Level 2 certificate qualifies the holder to supervise high-pressure water jetting operations, take responsibility for on-site risk assessment, write or approve method statements, and ensure that Level 1 operators are working safely and within the scope of the agreed task. It is a leadership and accountability qualification as much as a technical one.

Beyond the practical jetting skills shared with Level 1, a Level 2 certificate holder carries a significantly broader set of responsibilities:

• Conducting and documenting site-specific risk assessments before work begins
• Preparing and communicating method statements and safe systems of work to everyone involved
• Selecting the correct pressure range, nozzle configuration, and equipment for each individual job
• Briefing Level 1 operators through toolbox talks and ongoing supervision
• Continuously monitoring changing site conditions during live operations
• Holding the authority to halt work immediately if safety is compromised
• Liaising directly with client site management on permit-to-work requirements
• Maintaining records of equipment inspections and operational parameters throughout the job

In practice, a Level 2 supervisor carries legal and moral accountability for the safety of everyone within the jetting exclusion zone. This broader scope of responsibility is what fundamentally distinguishes the two qualifications and explains why both are typically required on any live jetting site.

What are the training and assessment requirements for each level?

Both levels require formal training delivered by an accredited provider, followed by a written knowledge assessment and a practical competency evaluation. Level 1 programmes are generally shorter, while Level 2 programmes require additional study time to cover supervisory duties, risk assessment methodology, and applicable regulations.

Level 1 training and assessment

Level 1 courses typically run over one to two days and combine classroom instruction with hands-on practical sessions. Candidates are assessed on their ability to safely operate equipment, identify hazards, and follow correct procedures. A written knowledge test confirms theoretical understanding of high-pressure safety principles, equipment components, and emergency procedures.

Level 2 training and assessment

Level 2 programmes are more intensive, often spanning two to four days, and usually require candidates to already hold a valid Level 1 certificate or demonstrate equivalent practical experience. Assessment includes a more demanding written examination covering risk assessment, legislation, and supervisory responsibilities, as well as a practical demonstration of supervisory competence. Some awarding bodies also require candidates to submit a portfolio of evidence drawn from real work situations, providing proof that supervisory skills have been applied in the field rather than only demonstrated in a training environment.

Certificates are not indefinite. Most awarding bodies require renewal every three to five years to ensure that certificate holders remain current with evolving best practices and regulatory changes.

Which certificate do you need for your specific job role?

If your job involves physically operating a jetting gun, lance, or automated jetting tool on site, you need at least a Level 1 certificate. If your role involves planning the work, supervising operatives, signing off risk assessments, or taking overall site responsibility for a jetting operation, you need a Level 2 certificate.

The appropriate qualification broadly maps to role type as follows:

• Field operators and technicians carrying out directed jetting tasks require Level 1
• Lead operatives or working supervisors who also jet but take responsibility for the team require Level 2
• Site supervisors and contractor managers overseeing multiple jetting operatives require Level 2
• Maintenance engineers specifying and overseeing cleaning contracts should hold Level 2, even when not operating equipment directly

In petrochemical, energy, and marine environments, client site rules often require that anyone entering an exclusion zone during jetting operations holds, at minimum, a Level 1 certificate, regardless of whether they are actively operating equipment. Always check the specific requirements of your industry sector and client before mobilising.

Can a Level 1 operator work without a Level 2 supervisor present?

No. In virtually all recognised industry frameworks, a Level 1 operator cannot conduct high-pressure water jetting operations without a qualified Level 2 supervisor present on site. The Level 2 supervisor’s presence is not a formality; it is a fundamental safety control that ensures someone with the authority and competence to halt work is always available.

This requirement is embedded in the guidance published by every major body that governs high-pressure jetting safety. In the Netherlands, SIR sets out supervision requirements for jetting operations across Dutch industrial sectors. At the European level, the EWJI publishes pan-European codes of practice that mandate supervisory oversight. In the UK, the WJA specifies in its guidance documents that a Level 2 supervisor must be present whenever jetting is in progress. The WJTA in the USA similarly requires qualified supervisory oversight under its recommended practices, and in Germany, DIRV incorporates supervisory requirements within its occupational safety framework for jetting work.

Allowing a Level 1 operator to work unsupervised would typically invalidate insurance cover, breach permit-to-work conditions, and expose both the individual and their employer to serious legal liability. If a Level 2 supervisor is unavailable, work must stop until one is present.

How do water jetting certificates align with international safety standards?

Water jetting certificates are designed to align with the safety requirements set by national and international industry bodies, ensuring that certified operators and supervisors meet a recognised baseline of competence regardless of where they work. The Level 1 and Level 2 framework is broadly consistent across Europe and beyond, though the specific awarding body and terminology may vary by country.

Key bodies shaping certification standards across different regions include:

• SIR (Netherlands) – provides certification and guidance relevant to Dutch industrial environments, including petrochemical and port facilities
• EWJI (Europe) – coordinates best practice among member states and works to harmonise certification standards, meaning certificates issued in alignment with EWJI guidelines generally carry broad recognition across European industrial sectors
• WJA (UK) – publishes the widely referenced codes of practice that underpin national certification schemes
• WJTA (North America) – publishes recommended practices that inform training standards across the continent and beyond
• DIRV (Germany) – sets occupational safety requirements for jetting operations within the national regulatory framework

When working across borders, it is important to verify that your certificate is recognised by the relevant body in the country where you are operating. Some clients and project specifications name a specific awarding body, so confirming this before mobilising avoids unnecessary delays on site.

How DERC Salotech supports your water jetting certification journey

Understanding the difference between Level 1 and Level 2 is one thing; having the right equipment and knowledge behind you when you step onto a job site is another. At DERC Salotech, we have spent over 40 years engineering high-pressure water jetting solutions specifically for the demanding environments where certified operators work every day.

Our industrial jetting systems are built to meet both metric and SAE standards, so whether you are working to Dutch, German, UK, or US specifications, the equipment performs consistently across the 500 to 3000 bar (7,250 to 43,511 PSI) range. Every system we produce incorporates the safety features that Level 1 and Level 2 training programmes reference, from reliable emergency stop mechanisms to pressure-rated hose assemblies, because safety-first design is not optional in the environments our customers operate in. Through our subsidiary DERC Adviesgroep, we also offer certified training courses that align with the standards set by SIR, EWJI, WJA, WJTA, and DIRV, helping operators and supervisors gain and renew their qualifications with confidence. With a presence in over 55 countries, we understand the varying certification and regulatory requirements operators face across different markets and can provide guidance that is relevant to your specific region and sector.

Whether you are a Level 1 operator looking for reliable equipment to support your daily work or a Level 2 supervisor specifying systems for your team, we are ready to help. Get in touch with us to discuss your requirements and find the solution that fits your operation.