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[ PC Spec Recommendations | Installation & Licensing | DRAINS Viewer | Drivers and Spreadsheets ]

Download DRAINS

You can download the DRAINS program to update an existing installation or to try out the demo version, which includes ARR 2019. The demo version is exactly the same as the full version except that it is limited to a maximum of 5 pipes or channels and 1 irregular channel. DRAINS runs under Windows 98 through Windows 10. Most dongles will run both the 32 and 64 bit versions of DRAINS. The 64 bit version is recommended if you have a 64 bit version of Windows.

For all dongles except old black UniKeys, Click here to download the DRAINS 64 bit version (DrainsSetup64.exe 33MB)

The current version of DRAINS is 2020.061 - 22 December 2020

The old black Unikey dongles will only run the 32 bit version of DRAINS. Please email Watercom at info@watercom.com.au for further download instructions.

DRAINS Installation & Licensing

DRAINS requires valid licensing files 'Drains.duc' and 'Drains.txt' to be located in 'C:\ProgramData\Drains' (NOT 'C:\Program Files\Drains'). You can find these files included on your USB received when purchasing DRAINS, or in an email from Watercom when renewing updates and support.

Download DRAINS installation guide

Click here for common installation issues

Download Network installation guide & trouble shooting


The free viewer allows anyone to open DRAINS files and inspect the model structure and inputs. If a DRAINS .drn file contains stored results, these can also be viewed, and exported to spreadsheets. The Viewer operates in the same way as DRAINS, but does not allow models to be altered or run.

Request Link to the DRAINS Viewer

The purpose of the Viewer is to make checking or reviewing of DRAINS models easier, either within an organisation, or between organisations such as a consultant preparing a model and a Council reviewing this. The Viewer can be freely distributed by DRAINS users to other organisations.

The Viewer will need to be periodically updated when the DRAINS .drn format alters, otherwise it will not be able to view files created with the latest version of DRAINS.

Refer to the DRAINS Help System topic "DRAINS Viewer installation and operation" for more information.

DRAINS User Manual

The DRAINS User Manual has been superseded by the DRAINS Help System accessible from the DRAINS program, which contains more current information on using DRAINS.

Download Network Dongle Drivers and Various Spreadsheets

You can download various Spreadsheets and drivers for HASP dongles.

Click here to be transfered to the Kustom Engineering Downloads page, where you can download the latest versions of the Drains Utility, Generic Pit & Overflow Route Generator Spreadsheets

Click here and select the Sentinel HASP/LDK - Windows GUI Run-time Installer to download the HASP driver.