1/2" MPT x 3/4" hose fitting.Surface mount plastic flange. Lead free brass check valve. Connect it tight grips. Includes rubber dust cap. Surface mount metal flange. Cutout Dim: 1-1/2" dia. Outside Dim: 2-7/8" dia. Valve Depth: 1-5/8".

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov