Airgap AG180-002 Universal Multi-Drain Air Gap for Condensates, Water Softeners and Water Filters with 1/2-inch and 3/4-inch PVC and Copper Pipe AdaptersAirgap AG180 002 The AG180 002 Universal Air Gap provides an effective way of connecting condensate, water softener, and RO and iron water filter discharge to a floor drain or 2 inch standpipe. This universal air gap installs into 2 inch standpipes or sits on top and attaches directly to a floor drain grill. This air gap connects to any floor drain grill using a stainless hook. Once connected to the drain grill, all water is discharged through the air