DESIGN of EAVES GUTTERS, BOX GUTTERS & DOWNPIPES
to the Australian National Plumbing Code AS/NZS 3500.3.2:2003
NEW: Water Pipe Size Calculator
Diagramatic of eaves gutter and downpipe

box gutter at end diagramatic
BOX_GUTTER WITH RAIN WATER HEAD
AT END OF BOX GUTTER. Simplified

Suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only, or any roof if you are in a hurry and make the necessary allowances for all catchments.


Rainwater head and box gutter
BOX_GUTTER AND RAIN WATER HEAD
AT END OF BOX GUTTER

Allowance for vertical faces and catchments on both sides of box gutter.


Sump diagramatic with side overflow
BOX_GUTTER AND SUMP
WITH SIDE OVERFLOW

Allowance for vertical faces and catchments on both sides of box gutter.

Sump with vertical overflow
BOX_GUTTER AND SUMP
WITH VERTICAL OVERFLOW

Allowance for vertical faces and catchments on both sides of box gutter.


pipe diagramatic

PIPE_SIZE CALCULATOR
Including "Charged" Downpipes and pipes draining to tanks, watercourses etc.

Example Storm Water drainage plan



FULL_STORM WATER NETWORK CALCULATOR
Including Rectangular Pipes and splitting flows into multiple pipes, especially when entering Kerbs etc.
Starts with 40 pipes, but can drain those pipes into the next 40 pipes and so on.

Overland flow Diagramatic


Map of Australia

Intensity, Frequency, Duration curves. For Australian towns.
Intensity, Frequency, Duration curves. For New Zealand.
Requires coordinates of location.
Found by google search " 'your required location' coordinates"
Alternatively download the 1:100 year map.


THE FOLLOWING CALCULATORS ARE OUTSIDE THE SCOPE OF THE PLUMBING CODE;
BUT ARE VERY USEFUL IN PRACTISE.


Spitter at upstream end diagramatic

SPITTER AT UPSTREAM END
(PLUMBING CODE USES DOWNSTREAM END)
Requires flow to be calculated in one of the other calculators.

Non rectangular box gutter diagramatic

NON_RECTANGULAR BOX GUTTERS
Code only allows for rectangular box gutters.
Requires flow to be calculated in one of the other calculators.
Almost any shape with maximum of 5 sides can be used.

Custom Rain water Head diagramatic

CUSTOM RAIN WATER HEAD
Allows for any shape of RWH. Rectangular or Circular Downpipes. Rectangular or circular spitters, any number of circular spitters, And reduction in down pipe size by using a 'funnel' section.
Requires flow to be calculated in one of the other calculators.

Copyright 2015 Ken Sutherland