Hydroponics is a method of growing plants using mineral nutrient solutions, in water, without soil. It is a must that you keep a good water system to keep them growing green and healthy. Built-In Technology - Once the water level in the reservoir went down, the water pressure will then push the lock rod and the water will be released. Stops When Suffice Water Level Reached - This float valve makes use of a floater that rises up as the water rises. When it hits the right level of water the valve will push the rod to automatically shut off and cut the water supply. Top of the line Quality - This float valve is made from high-quality plastic material that is noted for durability and a well-assembled valve component that contributes to the wellness of the product. Perfect For Aquarium & Livestock Water Feeder Too! - Aside from its role as water provider for your growing plants in hydrophobic gardening, it also plays a vital role in maintaining good water