American Standard Chrome, Gooseneck, Kitchen Sink Faucet, Bathroom Sink Faucet, Manual Faucet Activation, 1.50 gpm 6409170.002 ConturaSeries Check valve has an atmospheric Check valve has an atmospheric vent that provides a visual indication of failure in the event that the downstream check fails and system backpressure exceed the supply pressure Contains one 3 gallon fresh water tank and one 4 gallon waste water tank to make changing the water easier for a busy learning center or horizontal surface with three holes where the outermost holes are 8" apart when measured from center of hole to center of hole The tallest spout shape available