I'm not very intimate with Purwater. I've only been at one place here in Florida that had one. Looking at Purwater website, it looks like they use cyclonic separators for the "cleaning" process of the waste water. This process will remove solids that have not dropped out from gravity in the storage tanks. There seems to be a difference of opinion on the effectiveness of this process as to the size of particles that are removed. Obviously, the bigger the piece of dirt, the easier it is to spin it out. You need to look at the claims very closely, as they may not tell the whole story. For instance, say it removes pieces larget than 20 microns. That leaves a whole bunch of smaller ones that will erode all sorts of things. In a friction machine, where you don't have any high pressure pumps, this might be okay. And while these seperators will clean the water to some extent, I don't see what they do to control odor. If I'm missing something, someone please correct me. Odor control is definitely a major part of the equation in any reclaim, with all systems out there. When you get a period of a few days of rain, and no one is using the wash, the water sits in the tanks and goes septic. It stinks. I would ask any supplier of these systems to provide me with names of operators with similar conditions of equipment and geographical location so that you could talk to them. In fairnesof open disclosure, I sell the Catec system. Look around and ask. If the local supplier can't provide references, have him get names from the manufacturer. Of all the disappointing things that I see operators dealing with, reclaim is number one. Good luck.