PLUMBING AND DRAINAGE - AS/NZS 3500.1 AND AS/NZS 3500.2 UPDATED  


AS/NZS 3500.1:2003 Plumbing and Drainage - Water Services, and AS/NZS 3500.2:2003 Plumbing and Drainage - Sanitary Plumbing and Drainage have both been updated to a 2015 version. The purpose of the update seems to have been to align more with the NZ Building Code (NZBC).

However AS/NZS 3500.1:2003 and AS/NZS 3500.2:2003 are cited and recognised by the NZBC, but AS/NZS 3500.1:2015 and AS/NZS 3500.2:2015 have not yet been cited by the NZBC.  So at this point in time the 2003 versions are the means of compliance.

So how do these Standards fit in?

Water Services

The main Acceptable Solution for this is NZBC G12/AS1 Water Supplies - except for a minor note it does not mention AS/NZS 3500.1:2003.

So AS/NZS 3500.1:2003 is not strictly an acceptable solution, however part of it, along with all of AS/NZS 3500.4:2003 Plumbing and Drainage - Heated Water Services, do satisfy the Verification Method NZBC G12/VM1.

Masterspec mostly use AS/NZS 3500.1:2003 (and AS/NZS 3500.4:2003) as an option to NZBC G12/AS1 for pressure testing the water systems. The Standards have much more thorough and rigorous testing than the NZBC.  The Standards, unlike NZBC, also take account of system fittings and fixtures that may not be suitable for the same full pressure test.

Sanitary systems image Sanitary Systems

The main Acceptable Solution for this is NZBC G13/AS1 Sanitary Plumbing. It's scope is limited to buildings/systems not more than 3 storeys and does not include specialised systems (ie. hospitals, labs, and some industrial waste, etc). However there is another Acceptable Solution which does not have these limitations and that is NZBC G13/AS3 Plumbing and Drainage, which allows the use of AS/NZS 3500.2:2003 (modified by clauses in NZBC G13/AS3) as an Acceptable Solution.

In most of the related Masterspec sections AS/NZS 3500.2:2003 is offered as an option to NZBC G13/AS1 - with optional clauses using one or the other means of compliance. These are easily selected using the Masterspec Q&A tool.

Foul Water Systems

The main Acceptable Solution for this is NZBC G13/AS2 Drainage - it's scope is limited to pipe diameters no more than 150mm and non-pressurised systems (non-gravity flow, pumped etc). It does not include some industrial wastes, etc.  Again there is another Acceptable Solution which does not have all these limitations and that is NZBC G13/AS3 Plumbing and Drainage, which allows the use of AS/NZS 3500.2:2003 (modified by clauses in NZBC G13/AS3) as an Acceptable Solution.

In most of the related Masterspec sections AS/NZS 3500.2:2003 is offered as an option to NZBC G13/AS2 with optional clauses using one or the other means of compliance. These are easily selected using the Q&A tool. 

Masterspec

Until the NZBC cites the new 2015 versions of these Standards, or MBIE issues some sort of directive, Masterspec will continue to use the compliant 2003 versions. If you want to use the 2015 version consult with the BCA as to their requirements before changing the specification.

All related Masterspec work sections have been amended with "2003" being added to the Standards number. Remember if a Standard has no year stated it is automatically assumed you are citing the latest version (refer 1233 REFERENCED DOCUMENTS, clause 1.1).

Masterspec will monitor the situation and keep you informed on developments.

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