Downloading 185Graph 4.2 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the program is Reckon It, Inc.
This PC software works fine with 32-bit versions of Windows XP/Vista/7/8/10/11. The program is categorized as Education Tools. The most frequent installation filename for the software is: 185GraphV4.exe. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The most popular versions of the software 4.2, 4.1 and 4.0.
From the developer:
185Graph is a 1.85 graph based fire sprinkler hydraulic calculation software program specifically designed to graph sprinkler demand vs. water supply. It calculates base of the riser demand with the Grid Calculator, Tree Calculator or Head by Head Worksheet and will plot these demands against any water supply. Water supplies can be adjusted for friction loss, elevation and/or hose streams.
You may want to check out more software, such as Wintree, World Geography Tutor or FSAcars, which might be similar to 185Graph.