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DRAINS Training


We're excited to announce new dates & training options!

Suitable for both new and experienced DRAINS users, you will:

‣ Discover the latest features in DRAINS
‣ Learn or refresh your knowledge on DRAINS fundamentals
‣ Understand how to apply AR&R 2019 guidelines, and more.

Plus, with any In-Person, Live Online or Private Training, you'll also get 30 days of free access to our Self-Paced Online Training!


Melbourne: 22-23 Nov 2023
Perth: 27-28 Feb 2024
Adelaide: 13-14 Mar 2024

DRAINS New Release



We're excited to release our BIGGEST update: DRAINS v2023.06.

Some highlights:

‣ NEW: Change Simulation Run-Time Multiplier to extend model run times
‣ NEW: Detention Basin Infiltration Effective Ratio Multiplier
‣ IMPROVED: Increased Storm Duration Limit to allow up to a 20-year continuous storm analysis
‣ FIXED: Auto-launching DRAINS when double clicking on a .drn model file

... and loads more! Read the full release notes here.

New DRAINS update available


We design, develop and support Australia's leading modelling and analysis software for stormwater and drainage systems.

Australian-owned and operated since 1998.

Starter Bundles

New DRAINS user?

Grab our Starter Bundle

1 yr DRAINS subscription
(all modules)


In-person or Live Online training


1 yr access to Self-Paced Training


All software updates & support

... all from just $2,700*! A 32% saving.

Starter Bundles are available in 20-link, 50-link or Unlimited link options.

*Excludes GST. Pricing for DRAINS 20 Starter Bundle with early bird discount. DRAINS 50 and Unlimited link Starter Bundles are $3,400 and $4,100 respectively with early bird discounts, excluding GST.

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DRAINS: Australia's leading Stormwater Drainage System design and analysis software.

Developed and supported locally, DRAINS is Australia’s most trusted and widely-accepted modelling and analysis software for stormwater and drainage systems.

Celebrating its 25th year, DRAINS allows users to design and analyse stormwater drainage systems, produce summary graphs and tables, and create pipe long-section drawings.

DRAINS also incorporates the latest Australian Rainfall and Runoff (AR&R) guidelines.

  • Draw drainage system components such as sub-catchments, pits, pipes, detention basins, channels and overflow routes.
  • Use several available hydrological models recommended by the AR&R guidelines.
  • Solve the full unsteady flow equations in pipes, channels and overflow routes.

First software to incorporate AR&R Design Procedures & BOM 2016 IFDs (January 2017)


AR&R Compliant

First software to incorporate the new Australian Rainfall and Runoff (AR&R) design procedures.


Use IL-CL (the AR&R preferred model), Horton ILSAX, Rational & Extended Rational Method models, and a Storage Network Routing Module that includes RORB, RAFTS and WBNM.


Solve the full unsteady flow equations, which is useful for analysing complex surface flooding situations where storage or backwater effects occur in overflow routes, or when splitting surface flows in multiple directions.

Licensing Options

DRAINS is available as a Subscription or USB Perpetual licence in multiple configurations.

All new DRAINS licences include the Australian Rainfall and Runoffs’ (AR&R) Initial Loss – Continuing Loss (IL-CL), Horton (ILSAX) and Rational & Extended Rational Method hydrological models, and are capable of analysing AR&R temporal patterns and design procedures.

All DRAINS licences also include the Full Unsteady Hydraulic Model, Storage Network Routing Models (RORB, RAFTS & WBNM hydrological models) and the GIS Module.

Note: When referred to below, a “link” is a pipe, channel, pump, orifice link or weir link.

Included Modules

Three additional modules are included with new DRAINS licences.

Storage Network Routing Module

The Storage Network Routing Module adds the RORB, RAFTS and WBNM storage routing hydrological models, useful when modelling large urban or rural sub-catchment areas where estimating the time of concentration with time area routing might be difficult.

DRAINS RAFTS does not rely on XP Rafts and is not affected by the discontinuation of XP Rafts by Innovyze.

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GIS Module

The GIS Module is useful where you need to interface with GIS systems that support ESRI shapefiles or Mapinfo MID/MIF files. This module allows transfer of data and results between DRAINS and GIS.

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Rational + Extended Rational Method Hydrological Module

The Rational + Extended Rational Method Hydrological Module adds the ability to model the rational method procedures with ARR87, ARR2019 and AS3500.3.

The Extended Rational Method allows users to produce hydrographs to improve detention basin analysis and utilise the full unsteady hydraulic model. This is achieved by including temporal patterns as part of the analysis and including the ability to model ensembles of storms from ARR2019.

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Maintenance & Support

Request a QuoteView PC Specs

In-Person & Online Training

In-Person WorkshopsOnline Training

Recent News

November 15, 2023 in DRAINS Viewer, News, Release Notes

New version of DRAINS Viewer released (v2023.11)

A new version of DRAINS Viewer has been released: v2023.11.8718.35267 - 15 November 2023 DRAINS Viewer is free. It allows anyone to open DRAINS files and inspect the model structure, inputs and results. The Viewer operates in the same way…
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November 15, 2023 in DRAINS, News, Release Notes

New version of DRAINS released (v2023.11)

A new version of DRAINS has been released: v2023.11.8718.30178 - 15 November 2023 Download the new version now. RELEASE NOTES ADDED: Added ability to create a temporary Pit size and display a warning if no Pit size has been detected…
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September 28, 2023 in News

New ‘National Roads’ Dataset

New 'National Roads' dataset released in Digital Atlas of Australia Have you seen the new National Roads dataset? Released in the Digital Atlas of Australia, the exciting new dataset offers comprehensive, reliable and up-to-date information on Australia’s road networks, including…
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July 3, 2023 in DRAINS, News, Promotion, Training

New DRAINS user? Grab our Starter Bundle

The Starter Bundle is the perfect set of tools and features for onboarding a new DRAINS user, expanding your team, providing flexibility to work from home, or stepping foot into DRAINS for the first time. The DRAINS Starter Bundle includes:…
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For further information on our products, licensing options, updates, support and/or training, please get in touch.