1.It is ideal for water tanks which are filled by running water or a pressure system controlled by water pump. The valve gives a level difference which is adjustable from 50mm up to 2.5m to minimise starting and stopping of running water or the pump system(Level difference accept Customization). 2.APPLICATIONwater tankwater towerwater poolIrrigation animaldrinkingSprayequipmentswimmingpool etc. 3.WORK PRINCIPLEIt fits easily through a thin walled tank or screws into a threaded tank inlet.As the tank empties,the float travels down the cord until it hits the level topper.The valve then opens immediately to give a full flow.As we discharge te water, the valve now runs constantly and the float rises until it hits the level adjuster. This lifts the arm and the valve shuts down. 4.ADVANTAGEHigh flow, Start and stop levels can be easily adjusted to give water level differentials from 50mm to 2.5 m, Keeps pump operation to a minimum, Valve Seal Access System for quick accesstovalveseal, Ideal for all makes and models of tanks, Available inlet sizes. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.