Features: The AUTOMATIC WATER LEVEL CONTROL VALVE is a patented product, which is lnstead of typical drift valve automatically shipping and stop water per the water point change. Product Principle: When water point upward push to water restrict line, water point management valve will give up supplying water at once; when water point of water tank fall down, the valve will begin to supply water automatically. Specification: Actuator Mode : Without Manual And Instruction Media : Water Temperature of Media : Medium Temperature Standard or Nonstandard : Standard Model Number : JYW-15/20/25 Power : HYDRAULIC Pressure : 0 Material : Plastic Structure : Ball Origin : Mainland China Water consumption method : Water from the facet Model Number : Water Level Control Valve Installation : Outside Temperature : Less than 70 degrees Celsius Pressure : Low Pressure Package included: 1x Inlet valve 1 allow an error of 1-2 centimeters since the merchandise are all manually measured 2 perceive the colour variations attributable to varied exhibits on the video display three can be very grateful for this, when you are convinced with the product and depart a five-star review