Just wanted to say thanks to these guys for such a great product. Many models to choose from. Great prices. And above all a high quality well made product. Instructions were detailed. All the fittings were labeled for easy install. Comes with ro fast flush which most don't or charge extra for. Plus you can't argue with results. This is their industrial grade tds meter and that is out of the ro filter only. Not di. Yes you read that right. That's 001. That's amazing. If you are in the market for one of these get in touch with these guys.