Starter Bundles

New DRAINS user?

Grab our Starter Bundle

1 yr DRAINS subscription
(all modules)


2-day in-person


1 yr e-learning


All software updates & support

... all from just $2,600*! A 36% 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 $3,300 and $4,000 respectively with early bird discounts, excluding GST.

Workshops Announcement

DRAINS Core Workshops


Our comprehensive DRAINS workshops are back for 2022!

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, get 90 days of free e-learning access.

2022 DATES

Tamworth: 24-25 Aug
Sydney: 1-2 Sep
Brisbane: 26-27 Oct
Melbourne: 9-10 Nov



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

Australian-owned and operated since 1998.

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DRAINS: Stormwater Drainage System design and analysis software for Australian practice.

Developed and supported locally in Australia, DRAINS allows users to design and analyse stormwater drainage systems, produce summary graphs and tables, and create pipe long-section drawings.

DRAINS 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 and USB Perpetual licence in multiple versions.

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

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

Additional Modules

Three additional modules are available for DRAINS.

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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Updates & Support

Request a QuoteView PC Specs

Workshops & E-Learning

Go to Kustom Engineering

Recent News

August 11, 2022 in News, Promotion, Training

New DRAINS user?
Grab our Starter Bundle

We're excited to introduce our new DRAINS Starter Bundle. The Starter Bundle is the perfect set of tools and features for onboarding a new DRAINS user, expanding your team, providing…
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May 9, 2022 in News, Promotion

Save Today with DRAINS eLearning Courses!

At Watercom, we believe that smartly delivered, accessible training is a vital and valuable tool for increasing employee skills and empowering high-quality, efficient and future-proof businesses - that’s why we…
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April 12, 2022 in News

Australian Government Announces New Small Business Tax Incentives

12 April 2022 The Australian Government has proposed two new tax incentives for small businesses - the Small Business Technology Investment Boost and Small Business Skills and Training Boost. Under…
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March 7, 2022 in News

Watercom’s DRAINS a “Key Tool” in Western Sydney Airport Drainage Network Design

3 March 2022 We offer our huge congratulations to Aurecon’s Yuna Chen and Arcadis Australia Pacific’s Rob Peterson on their great presentation on the Western Sydney Airport (WSA) drainage network…
Read More

For further information on our products, licensing options, updates, support and/or training, please get in touch.