Mike from Crystalflow installed an infrared filter system and a reverse osmosis system for me nearly five years ago. The water system works great and has had no problems. I am very happy with the quality of my water and the service. Mike maintains the system every year by replacing filters and changing the infrared bulb. The maintenance costs me about $300. I have compared the maintenance to this system with other companies and Crystalflow has the best price and the most professional and timely service.