BILD321 – Introduction to Drainlaying

Module code
Module title
Introduction to Drainlaying
To provide learners with an overview of drainlaying as a career and to gain the knowledge and skills for excavation and trenching.
  • TC2201
NZQA Level
Level 3
NZQA Credits
Delivery method
  • Web-Enhanced
Learning hours
Total learning hours
Resources required
Teaching and Learning Strategy
Directed hours are comprised of learning with a provider. These learning hours may include in-class activities; workshop activities and practice; coaching and progress conversations; formative assessment; night-class tutorials; group discussions and activities.

Self-Directed hours are comprised of Study Guide reading and activities; research using texts and the Internet; video; discussion groups, and online chat groups such as closed Facebook study groups; creating study notes, recording work experience.
Learning Outcomes
LO 3.1 Use basic calculations in a given trade situation
LO 3.2 Apply knowledge and skills to excavate and trench for plumbing, gasfitting, or drainlaying.
Assessment Criteria
Assessment in this module is competency-based. In order to pass this module students must attempt and meet all the requirements of the competency-based assessments including carrying out all tasks in a safe manner and to industry standard
Learning and Teaching Resource
Study Guide Textbooks
Skills quality assured competency-based assessment resources.
Plumbers, Gasfitters, and Drainlayers Act 2006;
Health and Safety at Work Act 2015;
Building Act 2004;
Health Act 1956;
Resource Management Act 1991;
Plumbers, Gasfitters, and Drainlayers Regulations 2010;
The following standards, which are available at
AS/NZS 1547:2000 On-site domestic wastewater management
AS/NZS 1546.1:2008 On-site domestic wastewater treatment units – Septic tanks AS/NZS 3500.2:2021 Plumbing and drainage – Sanitary plumbing and drainage;
The following guides, which are available at
Good practice guidelines – Excavation safety, Wellington: WorkSafe New Zealand, 2016
Guide for Safety with Underground Services, Wellington: Department of Labour, 2002;
The following clauses, and any related compliance documents, which are available at
New Zealand Building Code Clause E1 Surface Water
New Zealand Building Code Clause G12 Water Supplies
New Zealand Building Code Clause G13 Foul Water;
and all subsequent amendments and replacements.

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