Watts Premier 164020 DLA-D Drain Line Plumbing Adapter Universal adapter accommodates 1/2", 5/8", 3/4", and 7/8" dishwasher drain hose with 3/8" RO drain line Quick Connect for air gap faucets. Will require a reducer if the RO System does not have an Air Gap. Converts for installation with or without a dishwasher drain line connection. For installation without a dishwasher drain line the 3/8" RO faucet drain line connection can be cut off and installed on the disposal port. First barb supports 1/2" and 5/8", Second barb supports 3/4", and third barb supports 7/8" dishwasher drain lines. Installation of 3/4" and 7/8" drainlines will require the smaller barbs to be cut off. Unique design reduces noise from air gap faucets and prevents plugging Uses standard plumbing fittings to meet nationwide code requirements. The product is IAPMO/UPC and IPC Listed.