There is a bigger difference in the two systems other than the TDS Meter, although the TDS METER is a nice feature if YOU KNOW HOW TO USE IT (SEE "HOW TO USE A TDS METER"). <br /><br />If a customer has city water or a private well with considerable amounts of sediment, iron or sulphur, installing an RO system - ANY RO SYSTEM - is not a good idea without pretreating that water first. <br /><br />The krystalpureguy is not associated with the manufacturer, AMERIFLOW WATER SYSTEMS, or the retailer, LOWE'S, in any way other than the fact that I used to work for both of them and know them both well, and I am not responsible for their products or the level of customer service they provide. This site is maintained as a CUSTOMER SERVICE TOOL to attempt to answer your questions when you can't get help from the manufacturer or the retailer. If you have specific questions, email them to krystalpureguy@gmail.com and I'll try to steer you in the right direction. <br />If you have questions concerning REPLACEMENT PARTS, CONTACT THE MANUFACTURER at 1-888-579-7873. <br /><br />http://youtu.be/PKQF_4z-VEY
