Overflow Relief Gully (ORG) Building Codes & Rules
- Overflow Relief Gully : Tools™ simplifies the National Construction Code (NCC) with interactive graphics, including deemed to comply & best practices.
AS/NZS 3500.2:2018, 4.6.6.6
Lowest Fixture Point Measured FromAS/NZS 3500.2:2018, 4.6.6.6
- Top water seal of water closet
- Top surface of fixture outlet
- Top of grate of floor waste
- Overflow rim of water closet if in an out building or Room with falls to outside
AS/NZS 3500.2:2018, 4.6.6.4
LocationAS/NZS 3500.2:2018, 4.6.6.4
- Within Property
- External to Building
AS/NZS 3500.2:2021, 4.6.6.5 (b) (i)
Services Cover & Separation
Services Near Footings
Grade
Pipe Grades
Pipe Grade RULES
NCC 2022 V1
All Building Classes
NCC 2022
May 2023
AS/NZS 3500.2:2021, 3.4.1
AS/NZS 3500.2:2021, 3.4.2
AS/NZS 3500.2:2021, 6.6.1
- Drains or Discharge Pipe Grades as per tableAS/NZS 3500.2:2021, 3.4.1AS/NZS 3500.2:2021, 3.4.2
- Grades can be reduced where the Fixture Unit Loading (FUL) allows flushing of the DrainAS/NZS 3500.2:2021, 6.6.1
Water Seal
Finished Ground Level
Waste Charge
Floor Waste
Declared Flood Level
AS/NZS 3500.2:2018, 4.6.6.8 (a)
If Recessed
AS/NZS 3500.2:2018, 4.6.2 (c) (i)
AS/NZS 3500.2:2018, 4.6.2 (c) (i)
AS/NZS 3500.2:2018, 4.6.2 (c) (i)
AS/NZS 3500.2:2018, 4.6.2 (c) (i)
AS/NZS 3500.2:2021, 2.9.1
≥ 20 Mpa Concrete SupportAS/NZS 3500.2:2021, 2.9.1
AS/NZS 3500.2:2021, 4.6.6.4 (d)
Inside
Clear Height
Top of Grate
AS/NZS 3500.2:2018, 4.6.6.5 (b) (ii)
Lowest Fixture Point
AS/NZS 3500.2:2018, 4.6.3 (c)
AS/NZS 3500.2:2018, 4.6.6.6
AS/NZS 3500.2:2018, 4.6.6.5 (b)
AS/NZS 3500.2:2018, 4.6.6.7
Path or Paved AreasAS/NZS 3500.2:2018, 4.6.6.7
- Overflow Relief Gully may be flush with path or other hard surface, if
- Falls of other measures in place to direct stormwater away
AS/NZS 3500.2:2018, 4.6.3 (c)
Relief Gully ChargingAS/NZS 3500.2:2018, 4.6.3 (c)
- Tap only required if Gully not charged by a waste pipe
AS/NZS 3500.2:2018, 4.6.6.5 (a) (iii)
AS/NZS 3500.2:2018, 4.6.2 (b)
AS/NZS 3500.2:2018, 4.6.6.7
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