SAQA All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of hydraulics and flow measurement in water and wastewater systems 
SAQA US ID UNIT STANDARD TITLE
254076  Demonstrate knowledge of hydraulics and flow measurement in water and wastewater systems 
ORIGINATOR
SGB Water Sector 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 12 - Physical Planning and Construction Civil Engineering Construction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  12 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2026-06-30   2029-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
People credited with this unit standard are able to demonstrate knowledge of external factors affecting wastewater flows, and flow measurement techniques for wastewater.

This unit standard is for people who supervise maintenance and operations in water reticulation, and people who work in specialist water reticulation activities. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
Numeracy and literacy at an appropriate level or open access. 

UNIT STANDARD RANGE 
Water reticulation:
  • In this context refers to all pipe systems, pumping systems, and components that contribute to the collection and disposal of wastewater and stormwater.

    CCTV:
  • Closed circuit television. 
    		•

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe the hydraulics of a water reticulation system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The concept of pressure is described in terms of static pressure and variation of pressure. 

    ASSESSMENT CRITERION 2 
    Variation of pressure loss and hydraulic grade line are described in terms of flow rate changes. 

    ASSESSMENT CRITERION 3 
    Internal pipe pressure forces are described in terms of anchorage requirements. 
    ASSESSMENT CRITERION RANGE 
    Jointing requirements, end caps, bends, anchor blocks, ground loadings.
     

    ASSESSMENT CRITERION 4 
    The role of pumps is described in terms of the impact on hydraulic gradients. 

    ASSESSMENT CRITERION 5 
    Sources of pressure losses and hydraulic grade line are described in terms of flow rate changes. 

    SPECIFIC OUTCOME 2 
    Describe the hydraulics of wastewater collection systems. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The drainage system is described in relation to the natural lie of the land. 
    ASSESSMENT CRITERION RANGE 
    Catchment identification, pipe size increases with flow and fall reductions, need to maintain gravity property service, limitations of roading network relative to gradient required.
     

    ASSESSMENT CRITERION 2 
    The capacity of a gravity sewer is described in terms of the fall available, and diameter. 
    ASSESSMENT CRITERION RANGE 
    Concept of friction, velocity, surcharge, corrosion.
     

    ASSESSMENT CRITERION 3 
    The velocity in a sewer is described in terms of self cleaning limits. 
    ASSESSMENT CRITERION RANGE 
    Deposition of solids, scour velocity, minimum slope required, low flow conditions, flushing flows, flushing techniques, sulphide gas production.
     

    ASSESSMENT CRITERION 4 
    Wastewater pumping stations are described in terms of their impact on system hydraulics. 
    ASSESSMENT CRITERION RANGE 
    Rising mains, pressure concepts, intermittent operation, system head curves against pump pressure, flow curve.
     

    SPECIFIC OUTCOME 3 
    Demonstrate knowledge of external factors affecting wastewater flows. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Sewer flows are described in terms of design criteria for pipe capacity. 
    ASSESSMENT CRITERION RANGE 
    Flows domestic, commercial, industrial.
     

    ASSESSMENT CRITERION 2 
    Sewer flows are described in terms of the reasons for their variability. 
    ASSESSMENT CRITERION RANGE 
    Includes but is not limited to diurnal variation related to water use, seasonal variation related to inflow and infiltration, wet weather events.
     

    ASSESSMENT CRITERION 3 
    Inflow, infiltration, and exfiltration are described and distinguished in terms of source and potential causes. 
    ASSESSMENT CRITERION RANGE 
    Causes include but are not limited to leaking pipe joints, gully traps, manholes, illegal connections; reticulation type-combined, separate.
     

    ASSESSMENT CRITERION 4 
    Excessive infiltration and exfiltration are described in terms of their consequences. 
    ASSESSMENT CRITERION RANGE 
    Flooding, property damage, wastewater asset damage, public health risks, environmental damage, impact on wastewater treatment.
     

    SPECIFIC OUTCOME 4 
    Methods used to identify, prevent, or reduce inflow, infiltration, and exfiltration is described in terms of their techniques. 
    OUTCOME RANGE 
    Closed circuit television (CCTV), property inspection, smoke testing, dye testing, flow gauging, network modelling, pipe line and manhole rehabilitation, pressure testing. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Gravity flow measurement is described in terms of methods used. 
    ASSESSMENT CRITERION RANGE 
    Weirs, flumes; open channel meters-velocity measurement and ultrasonic or pressure depth sensors.
     

    ASSESSMENT CRITERION 2 
    Network flow simulation models are described in terms of their type, operation, and purpose. 
    ASSESSMENT CRITERION RANGE 
    Computer simulation of water and wastewater networks; calibration of flow meters; future network infrastructure planning; flow catchment studies inflow and/or infiltration, water loss/leak detection reduction programmes.
     

    ASSESSMENT CRITERION 3 
    Pressure flow measurement is described in terms of the meter types used. 
    ASSESSMENT CRITERION RANGE 
    Venturi, magflow, ultrasonic, piston, fan wheel.
     


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant ETQA according to the ETQA policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments at exit points of the qualification, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described both in individual unit standards as well as the integrated competence described in the qualification. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Learners are to have a knowledge and understanding of:
  • The current and relevant occupational health and safety legislation.
  • Work procedure and codes of practices.
  • Applicable material and parts specification. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made.

    This relates to all specific outcomes. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team, group, organisation, and community.

    This relates to:
  • Use and care for tools and equipment in accordance with work procedures. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Plan, organize and manage oneself and one`s activities responsibly and effectively.

    This relates to all specific outcomes. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.

    This relates to:
  • Identify safety risks and implement safety procedures in accordance with legislation and work procedures.
  • Identify problems and implement corrective action. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation.

    This relates to all specific outcomes. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically, showing responsibility towards the environment and health of others.

    This relates to:
  • Join similar pipes types in accordance with engineering drawings.
  • Join different pipe types in accordance with engineering drawings.
  • Join associated fittings and other pipeline devices as per code of practice.
  • Identify safety risks and implement safety procedures in accordance with legislation and work procedures.
  • Identify problems and implement corrective action. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation.

    This relates to:
  • Identify safety risks and implement safety procedures in accordance with legislation and work procedures.
  • Identify problems and implement corrective action. 
    		•

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    When conducting assessments, assessors must ensure that they are familiar with the full text of the unit standards being assessed. Assessors must ensure that the assessment covers the specific outcomes, critical cross-field outcomes and essential embedded knowledge by developing assessment activities and tools, which are appropriate to the contexts in which the learners are working. These activities and tools may include self-assessment, peer assessment, formative and summative assessment. It may be more effective and efficient to assess a number of unit standards together in an integrated way, thus reducing the overall number of assessments and ensuring that commonalities that exist between a number of unit standards are captured in a way that makes sense for assessment. 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  60155   National Certificate: Water and Wastewater Reticulation Services  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  EWSETA 
    Elective  66429   National Certificate: Landscape Irrigation  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  AgriSETA 
    Elective  66071   Further Education and Training Certificate: Computer Aided Drawing Office Practice (CAD)  Level 4  NQF Level 04  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  CETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    1. CHILUTSI TRADING ENTERPRISE 
    2. ERGO MAPHELONG INSTITUTE (PTY) LTD 
    3. ERWAT 
    4. HAZYVIEW WATER SKILLS ACADEMY 
    5. istudent Academy (Pty) Ltd 
    6. SEANEGO INTERGRATED NATURAL RESOURCES MANAGEMENT 
    7. THOBOLOGO TRAINING & EDUCATION GROUP 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.