CPCPPS5033 — Design vacuum drainage systems

Elements & performance criteria

Performance evidence

• designing, sizing and documenting the installation and layout details for a vacuum infrastructure sewer system for: • a residential development of 50 properties incorporating: • vacuum sewage collection chambers • vacuum sewer mains • vacuum pump station • pump rising main • ventilation • odour control • a high-rise mixed development building, to a minimum of 29 floors, inclusive of a basement, to include fixtures on each floor level, incorporating: • vacuum pump station • vacuum sanitary drainage system • pump rising main • ventilation • odour control
• applying sustainability principles and concepts throughout to achieve a star rating under the Green Building Council of Australia rating scheme
• evaluating and documenting design parameters, including client, regulatory and manufacturer requirements and relevant Australian Standards and codes complex sanitary plumbing and drainage systems
• evaluating health risks associated with the sanitary plumbing and drainage system
• selecting materials and components for compliance, fitness for purpose, durability, compatibility and cost-effectiveness.

Knowledge evidence

• common terminology and definitions used in the design of vacuum drainage systems
• application of statutory and regulatory requirements and relevant Australian Standards and codes including: • Acts, regulations and Commonwealth, state or territory and local government policies • AS/NZ 3500 National plumbing and drainage • AS 2200 Design charts for water supply and sewerage • Environmental Protection Authority (EPA) • National Construction Code (NCC) • Sewerage Code of Australia • other relevant Australian Standards and codes
• scope of work requirements: • interpreting plans and specifications • sizing and documenting layout of vacuum drainage systems including residential, commercial and industrial
• design requirements: • acoustic performance • architectural plans • building specifications • fire safety requirements • flow requirements and sizing of pipework • odour control • owner requirements • pipework identification • Sewerage Code of Australia • vacuum pumping station • ventilation requirements
• cost-benefit analysis comparing suitable materials and system choices available to enable cost-effective choices without compromising the integrity of the project
• nature of materials used and effects of performance under various conditions: • copper (Cu) • polyethylene (PE) • polypropylene (PP) • polyvinyl chloride (PVC) • stainless steel • other approved material
• manufacturer requirements: • material specifications • collection and storage systems • design and installation • equipment installation • pump installation • selection of compatible sanitary fixtures • technical manuals • manufacturer specifications, including hazards identified in relation to devices and systems used
• information required to conduct a desktop study to outline design parameters: • architectural and building plans • developer plans • manufacturer data • other documents relevant to designing vacuum sewerage systems
• characteristics and application of different jointing methods
• vacuum drainage system attributes: • availability • cost • flexibility • installation requirements • low water usage • risks • vacuum loading units (VLU) • site conditions
• performance requirements of vacuum drainage system: • discharge requirements • durability • emergency storage and/or power backup • longevity • self-cleaning ability • sufficient capacity
• layout of pipework systems: • sewer infrastructure systems: • cover • grade • location of vacuum pump station • location of vacuum sewage collection chambers • odour control • pipe access • ventilation • high-rise building projects: • acoustic performance • amenity of the building • clipping and pipe support • location of pipework (fire rating of enclosure) • function of the building • impingement on floor heights • materials to be used • size of penetrations • type of building structure • effect on building integrity and aesthetic appeal
• principles of economy, serviceability, durability and fit fur use
• installation requirements: • acoustic performance • bedding • pipe protection: • cover • corrosion • impact • grade • level of workmanship • fire rating • manufacturer-recommended specific fixings • pipe support • provision for pipe movement • serviceability and access
• pipe size calculations including: • determining flow and fixture loadings • equivalent population (EP) density • calculating gradient • interpreting design charts and tables • determining self-cleaning velocities • manufacturer requirement • probable simultaneous demand
• uses and limitations for pipe supports: • bedding • bracket spacing • concrete support • corrosion protection • cover • hanging brackets • manufacturer-recommended specific fixings • material requirements • provision for expansion • thrust blocks • wall and ceiling brackets
• vacuum pumping station and pump control requirements: • access covers • automatic controls • capacity • corrosion-resistant materials • detailing • emergency storage • emergency power supply • high and low-level water controls and alarms • impeller sizing • inlet and outlet design requirements • installation and mounting requirements • macerator requirements • odour control • pneumatic control switch assembly • pump selection • pump sizing • pump well sizing • space requirements • vacuum pump systems • valve requirements • ventilation • warning system
• characteristics and application of different fittings, valves and controls: • fittings: • bends • elbows • inspection and maintenance access • tees • unions • valves: • backflow prevention • isolating • non-return • strainers • vacuum diaphragm valve • controls: • pneumatic control switch assembly • vacuum pressure sensing • motorised actuated valves • vacuum management system
• the use and limitations of computer software packages including manufacturer and proprietary design software
• plans and specifications requirements: • plans: • axonometrics • cross-sections • details • elevations • isometrics • schematics • site • sections • specifications: • access chambers (manholes) • bedding • commissioning • concrete support and detailing specialised components • jointing • manufacturer requirements • materials • odour control • pump rising main • work health and safety (WHS) • selection of compatible vacuum sanitary fixtures • support • testing • vacuum pump station • vacuum drainage collection chambers • vacuum sewer mains • ventilation • workmanship
• testing methods: • compressed air test • flow testing • hydrostatic test • inspection checklist • performance • vacuum • quality assurance (QA) audit
• commissioning schedule requirements: • system certification • check for foreign material • leak check • emergency procedures • system defects • system functions as per design
• operation and maintenance manual requirements: • as installed drawings • results of commissioning test • certification documentation • maintenance schedules • manufacturer brochures and technical information • operating procedures
• sustainability principles and concepts: • selecting appropriate material to ensure minimal environmental impact • efficient use of material • efficient energy usage/capital outlay comparison • positive effect on the environment in regard to no potential overflow or leakage • water efficient • consideration of the Green Building Council of Australia rating scheme • local environment consideration overflow disposal/reuse.

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