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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Install manual and automatic filters for an irrigation system 
SAQA US ID UNIT STANDARD TITLE
264039  Install manual and automatic filters for an irrigation system 
ORIGINATOR
SGB Ornamental Horticulture and Landscape 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 01 - Agriculture and Nature Conservation Horticulture 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 2  NQF Level 02  4 
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
2024-06-30   2027-06-30  

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 
A person credited with this unit standard will be able to:
  • Select a filter element that suits the required degree of filtration.
  • Identify the various types of elements and their individual benefits.
  • Explain the advantages of using a self flushing filter system.
  • Describe the valves and gauges that are necessary to monitor the filters.
  • Indicate the correct location of a filter in an irrigation system or on a pump station. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    Learners accessing this qualification will have demonstrated competence in:
  • Communication at NQF Level 1 or equivalent.
  • Mathematical Literacy at NQF Level 1 or equivalent. 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe the need for filtration. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The need for filtration is explained within the context of the possibility of upstream debris entering the system and the damage that can occur to the irrigation valves and other components. 

    ASSESSMENT CRITERION 2 
    The reason why filter elements are sized in microns is explained with regards to the fractions of a millimetre that would otherwise be required to grade a filter. 

    ASSESSMENT CRITERION 3 
    The nozzle to aperture ratio for irrigation sprinklers is stated and the reason for this particular ratio is explained with reference to the pressure and velocity of water through the nozzle. 

    ASSESSMENT CRITERION 4 
    The nozzle to aperture ratio for micro sprays is stated and the reason for this particular ratio is explained with reference to the pressure and velocity of water through the nozzle. 

    ASSESSMENT CRITERION 5 
    The nozzle to aperture ratio for drippers is stated and the reason for this particular ratio is explained with reference to the pressure and velocity of water through the dripper path. 

    SPECIFIC OUTCOME 2 
    Identify the various filter elements. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The characteristics of a screen element are described in terms of its method of operation and the ease with which it can be cleaned. 

    ASSESSMENT CRITERION 2 
    The characteristics of a disc element are described in terms of its method of operation and the resistance to collapsing when clogged. 

    ASSESSMENT CRITERION 3 
    The characteristics of a woven fibre element are described in terms of the method of operation and its ability to filter out microscopic particles. 

    ASSESSMENT CRITERION 4 
    The importance of noting the direction of flow for the different types of elements is explained with respect to the differing methods of filtration that is used. 

    ASSESSMENT CRITERION 5 
    The different grades of filtration that available for each type of element are described in terms of their suitability to various types of dirt and debris. 

    SPECIFIC OUTCOME 3 
    Describe the limitations of a manual filter and the advantages of using an automatic self flushing filter system. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The reasons why manually operated filter should be sized to accommodate at least one weeks debris is explained in respect of the extra labour that is required for more frequent cleaning. 

    ASSESSMENT CRITERION 2 
    The benefits of self flushing filter systems are described in terms of the ability to set the filter to flush before it becomes dirty according to manufacturer's specifications. 

    ASSESSMENT CRITERION 3 
    The necessity of installing two or more filters in a self flushing system id is explained within the context of the increased backwashing velocity that is obtained when flushing one filter at a time. 

    ASSESSMENT CRITERION 4 
    The features of self flushing filter are described in terms of the various programs that may be set on the flushing timer. 

    ASSESSMENT CRITERION 5 
    The backwashing intervals are determined in relation to the time that a pressure loss across the filter is observed. 

    ASSESSMENT CRITERION 6 
    The necessity of manually cleaning the elements is explained with regard to the removal of "fatty" and other difficult to remove substances. 

    SPECIFIC OUTCOME 4 
    Identify the most suitable positions to install a filter in an irrigation system or in a pumping plant and the valves that should be included. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The reasons why a filter should be fitted on the delivery piping and not the suction piping are explained with regard to the pump's cavitations if the filter becomes clogged up. 

    ASSESSMENT CRITERION 2 
    The necessity to install an isolator on either side of a filter is explained in terms of the ease of maintenance and the backflow that would otherwise occur. 

    ASSESSMENT CRITERION 3 
    The screening that is required when water is drawn from an open water source is described in terms of its size and coarse nature. 

    ASSESSMENT CRITERION 4 
    The importance of installing a pressure gauge on either side of a filter is explained with regard to observing the pressure drop across the filter when the unit becomes dirty. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against the qualification must be registered as an assessor with the relevant Education andTraining, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this qualification must be accredited as a provider with the relevant Education and Training, Quality, Assurance (ETQA) Body, or with an ETQA that has a Memorandum of Understanding with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant Education and Training, Quality, Assurance (ETQA) Body, or by an ETQA that has a Memorandum of Understanding with the relevant ETQA, according to the ETQA's policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described in the associated unit standards.
  • Anyone wishing to be assessed against this qualification may apply to be assessed by any assessment agency, assessor or provider institution that is accredited by the relevant ETQA. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Embedded knowledge is reflected in the Assessment Criteria for each Specific Outcome. 

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    The learner is able to identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made by:
  • Utilising the correct filter element to suit the water quality. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    The learner is able to organise and manage oneself and one's activities responsibly and effectively by:
  • Preparing the installation of an automatic self flushing system. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    The learner is able to communicate effectively using visual, mathematical and/or language skills in the modes of oral and/or written presentation by:
  • Relaying information on the time taken to register a pressure differential across the filter. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    The learner is able to use science and technology effectively and critically, showing responsibility towards the environment and health of others by:
  • Describing how the filter flushing controller operates the flushing mechanism. 
    		•

    UNIT STANDARD CCFO DEMONSTRATING 
    The learner is able to demonstrate an understanding of the world as a set of related systems by recognizing that problem-solving contexts do not exist in isolation:
  • Evident in all Specific Outcomes. 
    		•

    UNIT STANDARD CCFO CONTRIBUTING 
    The learner is able to contribute to the full personal development of themselves and the social and economic development of the society at large:
  • Evident in all Specific Outcomes. 
    		•

    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 
    N/A 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  66429   National Certificate: Landscape Irrigation  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  AgriSETA 


    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.
     
    NONE 


    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.