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City & Guilds Level 2 Diploma in Network Construction Operations – NCO2 GAS Service Layer

Course Duration:
Ten Days
Format:
In-Person
Location:
Home > Training Courses > NCO Gas & Water Training Courses > City & Guilds Level 2 Diploma in Network Construction Operations – NCO2 GAS Service Layer

Course Overview

The City & Guilds Level 2 Diploma in Network Construction Operations (NCO2) – Gas Service Layer develops the technical skills and safety competencies required to install, maintain and commission gas service pipes that connect the main gas network to domestic and small commercial properties.

Building on the foundation knowledge gained at NCO1, this qualification prepares operatives to carry out service-laying activities safely, efficiently and in line with current industry standards. Delegates gain hands-on experience in excavation, jointing, pressure testing and service commissioning, while also learning how to interpret technical documentation and maintain compliance on live utility sites.

This Level 2 qualification is recognised by the Energy & Utility Skills Register (EUSR) and forms a key step in progressing within the gas network construction and maintenance sector.

Course Duration:
Ten Days
Format:
In-Person
Location:
Book Course

Certification Awarded

City & Guilds NCO2 GAS Service Layer

Valid for

Five Years

Awarding Body

City & Guilds Approved Centre

Who should Attend This Course

This course is ideal for:

  • Gas operatives working on service pipe connections
  • NCO1-qualified individuals progressing into service layer roles
  • Employers seeking recognised training for domestic gas connection teams
  • Utility contractors needing formal certification for their workforce

Prerequisites

Must hold an in date Network Construction Operations Gas Level 1 (NCO1 Gas Assistant)

What To Have With You To Attend The Course

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Assessment

Assessment is carried out through the development of a portfolio of evidence, enabling learners to demonstrate their competence within practical, real-world working environments.

Course Content

The NCO2 Gas Service Layer programme covers the essential knowledge and practical skills required for installing and maintaining low-pressure gas service pipes, including:

Gas Service Installation Fundamentals

  • Installing low-pressure service pipes up to 63mm
  • Making safe and compliant connections to mains
  • Identifying materials, components and service installation requirements

Excavation, Backfill & Site Safety

  • Preparing and excavating for service installations
  • Maintaining safe working conditions around utilities
  • Applying reinstatement techniques following installation

Jointing & Testing Processes

  • Electrofusion jointing methods and safe operating procedures
  • Pressure testing and purging of new service installations
  • Commissioning service pipes and confirming system integrity

Working Safely on Gas Networks

  • Working near live gas in line with industry safety regulations
  • Following legislative and company procedures
  • Interpreting service drawings and documenting site activities

Operational Competence

  • Using powered tools, hand tools and equipment safely
  • Maintaining clean, safe and compliant work environments
  • Communicating effectively with supervisors, layers and operational teams

Pathway Options
Learners complete one of two specialist pathways; both cover the same core service-layer competencies:

1. Service Layer (Self Lay)

  • Focus on installing and maintaining gas services up to 63mm, including:
  • Establishing safe work areas
  • Excavating and supporting trenches
  • Electrofusion jointing
  • Performing mains connections and commissioning
  • Installing and testing gas services up to 63mm
  • Operating tools and equipment for highway and construction environments

2. Service Layer (Distribution)

  • Emphasis on service installation activities for distribution networks, including:
  • Safe excavation and reinstatement
  • Jointing processes and testing requirements
  • Commissioning and service connection to mains
  • Maintaining effective working relationships
  • Installing gas services up to 63mm in varied environments

Training is delivered through classroom learning, practical workshop sessions and portfolio development to ensure full competence in real-world tasks.

Frequently Asked Questions

What is the NCO2 Gas Service Layer qualification?
It’s a City & Guilds Level 2 Diploma that certifies your ability to install, connect, and test gas service pipes from mains to customer properties.

Do I need to complete the Gas Main Layer course too?
No, this course is specifically for gas service layers. If you need to work on both mains and service pipes, you’ll need both qualifications.

What are the prerequisites for this course?
You must hold an NCO1 Gas Assistant qualification or demonstrate equivalent field experience.

How is the course assessed?
Through a combination of written knowledge tasks, practical on-site assessment, and a compiled portfolio of work-based evidence.

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