ChairmanOfTheBored

I stumbled upon your discussion and created an account to chime in. I just finished building a deionizing filter that should be pretty similar to the CRSpotless systems in general design and function but for far less money than buying it from them. Their systems are nothing really proprietary, but they do look to be pretty well designed and built so I am not disparaging them. They use readily available components anyone can order and building it yourself is generally less expensive, but there certainly is a convenience in buying a commercial product. I decided to tinker with my own just for fun. I am waiting for a couple of minor parts one of the vendors left out of the shipment (some screws and a mounting bracket), but the functional pieces should all be assembled later today and I am hoping to test the system this weekend (supposed to rain tonight and tomorrow here in AZ). If the system works as expected, I will happily post my design and the sources from which I ordered the various parts and materials. I even found a source with amazing prices on the same ResinTech MBD-10 mixed bed resin CRSpotless and others seem to use. I built in the same sort of in-line Total Dissolved Solids (TDM) meter to monitor output quality and resin depletion. Some of the fittings and adapters can be found online and many are available in your local hardware store. The filter housings, refillable cartridges and resin are all available from quite a few different online suppliers.