What is an air gap and is it required when you buy a newport brass bridge faucet?A. The Newport Brass 100 air gap is a part that some dishwashers require to release pressure. It is not required for faucets. Check with the manufacturer of your dishwasher to find out if this is a required piece.
What is the ideal hole size for this air gap?\A. Thank you for your question! The Newport Brass 100 is 1 15/16" wide and would fit best in a 1.5" mounting hole.