Flexible PVC Pipe for Greywater
...NSFW!). The tree way diverter valve, you may recall, is a way to send that greywater temporarily back to the sewer should the need arise. Another, much cheaper way to divert grewater is with a duo of two way valves. The radical Greywater Guerrillas of Oak-town show you how to do this on their fantastic website (which seems temporarily to be under construction–check back later). So when the inevitable zombie hordes cause chaos across the land, just...