Elkay LK142 Push Button Bubbler Push-button valve bubbler designed so that water never comes in contact with lead-containing materials Built-in adjustable water volume control which regulates flow from 20 psi to 105 psi Heavy chrome-plated body with a 3/8" (10 mm) NPT connection Requires one 1-1/2" (38 mm) or 1-1/4" (32 mm) faucet hole