There was a download of WATHAM 9.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. This program is an intellectual property of HCP. The most popular version among the software users is 9.0. Watham.exe and wathamEd.exe are the most common filenames for this program's installer. WATHAM lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
Simulate the transient behaviour of water supply distribution networks. The specialised tool simulates most enclosed pipe hydraulic installations likely to be met in practice. It is most often used to assess and protect systems from damage caused by pressure surges.
In systems transporting a very large water mass it can help assess how long it takes the system to respond to pump status and valve position changes under automatic control.
You may want to check out more software, such as Plate 'n' Sheet Development Pro., CAD To DMC or TachyCAD, which might be similar to WATHAM.