2022 NCC Seminars: Volume Three - Sanitary plumbing and on-site wastewater treatment services

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foreign [Music]  

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Okay, leaving clean water behind let's move across  into Section C sanitary plumbing and drainage.  

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Now we jump across to the dark side and I'll give  you some insight into the changes in Section C  

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sanitary plumbing and drainage. I am proud to say  that the ABCB is leading the world in its work on  

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sanitary plumbing and drainage pipe sizing and  a new pipe sizing method has been included as a  

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verification method in NCC 2022. Aspects of the  verification method includes: determination of  

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sanitary plumbing wastewater flow rates, a system  on common discharge, a system two common discharge  

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design, system three branch design, and the C1V5  is for stack design. These verification methods  

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provide an alternative method to the use of  fixture units outlined in AS/NZS 3500.2. NCC 2022  

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and 2025 will bring a range of tools to improve  the efficiency of sanitary plumbing systems.

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This is a snip from the PCA draft showing  the new verification method for 2022 for  

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determining waste water flow rates. It is part  of the ongoing work the ABCB Office is doing  

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in a building and performance option for a new  and innovative plumbing and drainage systems.  

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At this point in time, whilst new pipe  sizing method won't alter the pipe sizes  

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that the Deemed to Satisfy requirements of  AS/NZS 3500 to provide to any great extent,  

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it will provide the ABCB with a platform to  provide an accurate and modern pipe sizing method  

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assisted by the additional research that will  be conducted leading up to 2025. I'd like to say  

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I'd let you spend a few moments identifying the  equation there but I'll just move on to slide 16.

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There are also new DtS Provisions in part C1 for  2022. As with cold water, we have carried over  

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certain aspects into the sanitary plumbing site.  These include bushfire prone areas and elements  

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of water efficiency. This introduces further  consistency across the PCA. Some people ask why  

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is it necessary for water efficiency provisions  to be included when it comes to sanitary plumbing,  

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but by including DtS Provisions like this a  consistent national approach can be achieved.

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Following part C1 comes part C2 sanitary drainage  systems. Sanitary drainage is all about getting  

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rid of or disposing of the waste water. Sanitary  fixtures and sanitary appliances must be provided  

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with an adequate disposal system that does not  impact adversely on occupants of the premises,  

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property, the environment or the network  utility operator's infrastructure.  

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In 2019 there was really only one all-encompassing  provision, so in 2022 the provisions have been  

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pulled out separately. The new performance  requirements include disposal, swimming pool  

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drainage, access, ventilation, contamination,  and uncontrolled discharge and damage.

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Add to the performance requirements we just saw,  changes in this part includes a new pipe sizing  

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method for sanitary drainage systems through  the introduction of new verification methods.  

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The two existing verification methods  brought over from 2019 are velocity and  

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liquid to air ratio and pressure testing,  and the new verification method for 2022  

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is shown on this slide - determination of  sanitary drainage wastewater flow rates.

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Extensive research has been carried out over  the past few years to get to where we are today  

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and has included some very highly qualified  consultants, academia and manufacturers from  

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around the world. Rigs like this one shown  in a Sydney manufacturing plant has provided  

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guidance on how advances in product design  affect sanitary pipe sizing. The information  

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we've received has informed the changes to the  NCC 2022 and we'll continue to provide the basis  

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where we are heading for 2025. Following this the  next step is including work on water pipe sizing,  

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and this will include both cold water and  heated water pipe sizing due to the different  

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performance characteristics.  On the homewood stretch now,  

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so introducing part C3 on-site wastewater  management systems. This is new for 2022.  

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Some of you may remember that on-site wastewater  management systems was in NCC 2016, but not in  

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2019. While this edition sees its return as it  has been included in the NCC volume 3 for 2022.  

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This is another area where we have been working  toward national consistency. The ABCB has been  

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working with the regulators of on-site wastewater  management systems across the country to develop  

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nationally consistent requirements. This is  include plumbing, health, and environmental  

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and protection agencies across the country. This  part covers systems that facilitates the on-site  

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storage, treatment, disposal, and or reuse  of wastewater as well as any associated land  

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application systems. Requirements for the septic  tanks, composting toilets, secondary treatment  

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units, gray water systems, and common effluent  drainage systems are all outlined in this part.  

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This is another area of work that may not be  the responsibility of the plumbing regulator  

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in your region but again, most of the  work is done by a licensed plumber.  

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This is a new DtS for 2022. You'll see by  the numbering that they are Deemed to Satisfy  

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provisions that reference specific Australian  standards. If a state and territory regulator  

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variation exists the viewer will see the links  to the relevant regulatory body and any other  

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specific requirements. And lastly a little more on  the interaction we have with standards Australia.  

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Standards play an important part in the PCA and,  as you have seen, many of the DtS provisions refer  

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to the specific standards to attain compliance.  NCC volume 3 references over 40 standards and  

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these are included in schedule 2. In all, the  NCC series references around 200 Australian  

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and international standards the NCC standards  management team are an integral members of the  

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development process for standards Australia, and  the ABCB office is involved heavily. We can assure  

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the user of the PCA that the reference standards  are fit for purpose. This concludes as part of the  

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NCC 2022 video series. I hope you have found the  content interesting. Any comments or questions can  

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be directed to us through the contact pages  on the ABCB website. Thank you for viewing.