ISPRING 7-stage Reverse Osmosis Water Filter System RCC7AK-UV is based on our legendary best seller model #RCC7. Featuring an 11-Watt UV Lamp with Smart Flow Sensor Switch and Alkaline pH+ and mineral balls, this model is the most comprehensive Reverse Osmosis water filter system in the market. In response to our customers’ reviews about the older model with the UV lamp that was constantly on, although the problem is still very common in today’s market, we do feel the pain of our customers. Therefore, we have developed a new model of transformer that features an inline Flow Sensor. Whenever you turn on the drinking faucet and water starts flowing, the UV lamp is powered on automatically. It turns off automatically when water is off. This prevents a potential heat hazard and extends the life of the UV light bulb dramatically. ISPRING RCC7AK-UV generates clean filtered water for drinking, cooking, hydroponics, aquariums etc. The unit removes hardness, heavy metals, toxins, and many other tap water contaminants. The equipped 11-Watt UV Lamp makes this model more suitable for potential highly contaminated water source such as well or groundwater. The alkaline filter provides pH balanced drinking water for human body.