Amerigap T52 RO kit, Extra Long Thread Air Gap with Twin Inlet Ports for Dishwasher and Reverse Osmosis - Chrome Designed to insure a legal air gap for a dishwasher and RO (reverse osmosis) filter Eliminates the need for an RO air gap faucet (cuts down on gurgling sound) Provides extra long thread for mounting through a thick counter-top Solid brass caps to match your faucet are available separately UPC listed to guarantee safety and tested for compliance to IPC and NSF standard