Transcript (ABCB) Presentation - Australian Water Quality Centre

AS/NZS
4020
HEADING
size
54 Arial
Testing of products for use in
SUB-HEADING
size
44
Arial
contact with drinking water
• TEXT size no small than 28 Arial
Peter Christopoulos
Australian Water Quality Centre (AWQC)
AWQC
Australian Water Quality
Centre
• Business unit of the South Australian Water Corporation.
• Water and Wastewater services, Chemical and Biological Testing.
• NATA and ISO Accredited test facility for all tests conducted.
• Research and Development Section.
• Deliver Water Quality and Treatment Technology solutions.
What does AS/NZS 4020 mean?
• Developed from the British Standard BS6920 in 1991.
• Suitability of products/materials in contact with drinking water.
• AWQC involved in the development of the 2002 and 2005 editions.
• Currently testing to the Fifth Edition – AS/NZS 4020:2005.
• AS/NZS 4020 is a requirement in the Plumbing Code of Australia for
materials and products in contact with drinking water
• AS/NZS 4020 Compliance contributes to WaterMark Level 1
Certification.
• Mandatory for Licensed Plumbers to use WaterMarked products.
Requirements of AS/NZS 4020
• The Standard ensures products/materials do not leach
compounds that can affect the health of consumers or the
aesthetics of water:
– The Taste or Appearance of Water.
– Does not support the Growth of Microorganisms.
– Do not release Cytotoxic or Mutagenic Compounds and Metals.
AS/NZS 4020 Covers the following:
Product Categories:
• Composite – Non-metallic products or
products with a combination of Metallic
and Non-Metallic components (eg
Tapware, Ball Valves).
•
Wholly Metallic – Metallic Pipes and
Fittings (eg Copper and Stainless
Steel Pipes).
•
Hot Water Systems – Water Heating
devices such as Solar, Gas, Heat
Pump combinations).
Example of Products Tested:
• Epoxy Coatings.
• Valves (Ball/Gate/Hydrant)
• Lubricants
• Domestic Tapware
• Hot Water Systems
• Sealing (Gaskets/O-Rings)
• Pipes and Pipe Fittings
• Water Tank Material
Not covered by AS/NZS 4020
• Lime
• Coagulants
• Activated Carbon (Filter
Media)
• Ion-Exchange Resins
• Electric Kettles
• Water Bottles
Requirements of AS/NZS 4020.
Composite Test
Wholly Metallic Tests
•
Taste Assessment
•
Taste Assessment
•
Appearance (Colour & Turbidity)
•
Appearance (Colour & Turbidity)
•
Microbial Growth
•
Cytotoxic Activity
•
Cytotoxic Activity
•
Extraction of Metals
•
Mutagenic Activity
•
Extraction of Metals
Requirements of AS/NZS 4020
Appendix K (HWS Testing)
• Appearance (Colour &
Turbidity)
• Cytotoxic Activity
• Mutagenic Activity
• Extraction of Metals
Understanding each Appendix.
Taste of Water Extract
Trained group of panellists assess water extracts for discernable tastes.
Appearance of Water Extract
Leaching of compounds that effect visual aspect of water. Colour and Turbidity.
Growth of Aquatic Microorganisms
Ability or inability to provide nutrient source for Microorganism growth.
Cytotoxic Activity of Water Extract
To ensure poisonous (toxic) compounds are not leached.
Mutagenic Activity of Water Extract
No compounds are released that can cause genetic mutations.
Extraction of Metals
Metallic elements do not exceed the maximum allowable concentration.
How Testing is Determined.
• Manufacturer/Supplier will seek evaluation from their Watermark
Conformity Assessment Body (WMCAB).
• WMCAB to advise level of certification and test conditions for the
Test Laboratory.
• Test Laboratory to undertake testing and provide Test Report to
Manufacturer/Supplier and WMCAB.
Testing in the Laboratory.
• Product is tested via immersion or ‘In-the-product’ exposure under
conditions specified by WMCAB.
• Water Sample Extracts are taken at set time intervals stipulated in
the Standard allowing product time to demonstrate ability or inability
to leach into Water.
• Samples are rinsed and flushed between Start and Finish to
simulate flow as in the field.
• Water Sample Extracts are then analysed in the Laboratory for
results.
Hot Water System under
AS/NZS 4020.
• Installed On-Site at the AWQC.
• Installed to Australian Plumbing Standards.
• Installed by a Licensed Plumber.
• Set up and Run per manufacturer’s specification.
• Water Extracts taken at specified times per Standard.
• HWS flushed to simulate flow rates and demand.
Potential Issues with Test Results.
Composite Products:
• Taste Assessment
• Cytotoxicity
• Microbial Growth
• Extraction of Metals
Products such as Brass
Valves, Tapware, Elastomeric
Compounds.
• Hot Water Systems:
• Appearance Test
Breakdown of enamels in
tanks or corrosion in tanks and
fittings.
Testing Consideration.
• 12 – 14 week duration for Composite Products/Materials.
• 6 – 8 week duration for Wholly Metallic and Hot Water Systems.
• Test Laboratory and WMCAB to determine sample selection, test
conditions and troubleshooting.
• Test Laboratory to provide AS/NZS 4020 Test Report at conclusion.
AS/NZS 4020 & WaterMark
• WMCAB to provide Product Manufacturer/Supplier with Type
Schedule.
• Type Schedule to include AS/NZS 4020 and Performance Testing.
• Compliance of Type Schedule to grant WaterMark.
• Licensed Plumbers/Builders to use WaterMark Compliance
components.
Conclusion
• A number of other Standards
reference AS/NZS 4020.
Check with your WMCAB.
• Challenge for manufacturers is
to produce commercially viable
products that do not leach
harmful compounds into
drinking water.
More Information on AS/NZS 4020.
• AWQC AS/NZS 4020 Test Laboratory
(08) 7424 1512
• Email
[email protected]
• Web
www.awqc.com.au
• Via your WMCAB