Remove materials and deposits by water jetting

Business Sectors (Suites): Associated Industrial Services Occupations (Construction)
Developed by: Construction Skills
Approved on: 29 Mar 2019


This standard is about removing materials and deposits by water jetting, selecting, preparing and using materials, components, tools and associated equipment, interpreting information, and adopting safe, healthy and environmentally responsible work practices

This standard is for people working in the occupational area of Water Jetting and can be used by operatives, supervisors and managers

Performance criteria

You must be able to:

P1 interpret the given information relating to the work and resources to confirm its relevance

P2 comply with the given, relevant legislation and official guidance
to carry out your work and maintain safe and healthy work practices

P3 select the required quantity and quality of resources for the methods of work

P4 comply with organisational procedures to minimise the risk of damage to the work and surrounding area

P5 comply with the given contract information to carry out the work efficiently to the required specification

P6 complete the work within the allocated time, in accordance with the programme of work

Knowledge and Understanding

You need to know and understand:

Performance Criteria 1

Interpretation of information

K1 the organisational procedures developed to report and rectify inappropriate information and unsuitable resources, and how they are implemented
K2 the types of information, their source and how they are interpreted
K3 the organisational procedures to solve problems with the information and why it is important they are followed

Performance Criteria 2

Safe work practices

K4 the level of understanding operatives must have of information for relevant, current legislation and official guidance and how it is applied
K5 the types of fire extinguishers and how and when they are used
K6 how emergencies should be responded to and who should respond
K7 the organisational security procedures for tools, equipment and personal belongings
K8 what the accident reporting procedures are and who is responsible for making the report
K9 why, when and how health and safety control equipment should be used
K10 how to comply with environmentally responsible work practices to meet current legislation and official guidance


Performance Criteria 3**

Selection of resources

K11 the characteristics, quality, uses, sustainability, limitations and defects associated with the resource*s* and how defects should be rectified
K12 how the resources should be used and how any problems associated with the resources are reported
K13 the organisational procedures to select resources, why they have been developed and how they are used
K14 the hazards associated with the resources and methods of work and how they are overcome

Performance Criteria 4

Minimise the risk of damage

K15 how to protect work from damage and the purpose of protection
K16 why disposal of waste should be carried out safely and how it is achieved

Performance Criteria 5

Meet the contract specification

K17 how methods of work, to meet the specification, are carried out and problems reported
K18 how maintenance of tools and equipment is carried out

Performance Criteria 6

Allocated time

K19 what the programme is for the work to be carried out in the estimated, allocated time and why deadlines should be kept


Performance Criteria 1

1 interpretation of drawings, specifications, schedules, method statements, risk assessments, current legislation, Codes of Practice, operating instructions and manufacturers' information related to the work to be carried out  

Performance Criteria 2

2 avoidance of risk by complying with the given information relating to the following
2.1 methods of work
2.2 safe use of health and safety control equipment
2.3 installing and maintaining safety measures for the working area
2.4 safe use, storage and handling of materials, tools and equipment
2.5 specific risks to health

Performance Criteria 3

3 selection of resources associated with own work
3.1 materials and substances
3.2 tools, water jetting plant and ancillary equipment

Performance Criteria 4

4 protection of the work and its surrounding area from damage
5 maintain a clear and tidy work space
6 disposal of waste in accordance with current legislation

Performance Criteria 5

7 demonstration of work skills to jet, direct, check, monitor and evaluate
8 use and maintain hand tools, portable power tools, water jetting and ancillary equipment 
9 operate water jetting equipment to remove materials and deposits to given working instructions from one of the following
9.1 drains and sewers
9.2 tubes and pipes
9.3 surface preparation and cleaning

P*erformance Criteria 6*

10 completion of own work within the estimated, allocated time to meet the needs of other occupations and/or client

Scope Performance

Scope Knowledge

Disposal of waste

1 environmental responsibilities, organisational procedures, manufacturers' information, statutory regulations and official guidance


2 operative's response to situations in accordance with organisational authorisation and personal skills when involved with
2.1 fires, spillages, injuries
2.2 emergencies relating to occupational activities

Fire extinguishers

3 water, CO2, foam, powder and their uses


4 those identified by risk assessment, methods of work, manufacturers' technical information, statutory regulations and official guidance

Health and safety control equipment

5 identified by the principles of prevention for occupational use, types and purpose of each type, work situations and general work environment
5.1 collective protective measures
5.2 personal protective equipment (PPE)
5.3 respiratory protective equipment (RPE)
5.4 local exhaust ventilation (LEV)


6 drawings, specifications, schedules, method statements, risk assessments, current legislation, Codes of Practice, manufacturers' information, operating instructions and official guidance


Legislation and official guidance**

7 this relates to the operative's responsibilities regarding potential accidents, health hazards and the environment whilst working in the workplace, below ground level, in confined spaces, at height, with tools and equipment, with materials and substances, with movement and storage of materials by manual handling and mechanical lifting 


8 operative care of hand tools, portable power tools, water jetting and ancillary equipment 

Methods of work

9 application of knowledge for safe and healthy work practices, procedures and skills relating to the method and area of work and materials used to
9.1 prepare and use jetting equipment to clean and remove deposits and materials from: drains, sewers, tubes and pipes (brick, clay, concrete, plastic, pitch fibre, ferrous and non-ferrous metals)
9.2 prepare and use jetting equipment to remove surface deposits and materials from: concrete, masonry, stone, rock, ferrous and non-ferrous metals
9.3 monitor and evaluate changes in surfaces and structures
9.4 secure temporary protection
9.5 monitor water jetting equipment for performance requirements
9.6 ​provide information for Building Information Modelling (BIM) 
9.6 recognise and determine when specialist skills and knowledge are required and report accordingly
9.7 determine specific requirements for structures of special interest, traditional build (pre 1919) and historical significance
9.8 identify and follow the quality requirements
9.9 work with, around and in close proximity to plant and machinery
9.10 direct and guide the operations and movement of plant and machinery
9.11 use hand tools, portable power tools, water jetting equipment: automated or semi-automated systems, and ancillary equipment
9.12 work at height 
9.13 use access equipment 
10 team work and communication
11 needs of other occupations associated with removing materials and deposits by water jetting


12 those arising from information, resources and methods of work
12.1 own authority to rectify
12.2 organisational reporting procedures


13 types of progress reports, timetables and estimated times
14 organisational procedures for reporting circumstances which will affect the work programme

Protect work

15 protect work against damage from general workplace activities, other occupations and adverse weather conditions


16 materials, components or fixings and equipment relating to types, quantity, quality, sizes and the sustainability of standard and/or specialist
16.1 water, fuel, ​power, chemicals, abrasives, lubricants, coolants, protective materials and equipment
16.2 barriers, guards, pump units, hose assemblies, guns, lances, control valves, nozzles and safety equipment
16.3 hand tools, portable power tools, ​water jetting equipment: automated or semi-automated systems, and ancillary equipment
17 confirm resources and materials conform with the specification
18 methods of calculating quantity, length, area, pressure drop, back pressure, reaction force and wastage of materials associated with the method and procedure to remove materials and deposits by water jetting

Security procedures

19 site, workplace, company, operative and vehicles





Links To Other NOS

External Links

Version Number


Indicative Review Date

28 Mar 2022





Originating Organisation


Original URN


Relevant Occupations

Industrial Cleaning Process Occupations

SOC Code



Cleaning; Drains; Sewers