it is a dwg file with various siphon drawings. Siphons are pipes for the flow of water. You can download the file with the siphon drawings and use it in your plumbing projects.
You can download the Siphons Dwg file from this page and use it in your autocad projects. All users can share and download files on Arkipedia. You need to wait for a while to download the file. If the file is not free, you can support it by checking out the subscription plans.