CLEAN HOME PRODUCT prevents wastewater from backing up into your dishwasher, eliminating the risk of contaminating your clean dishes – OVERALL HEIGHT with plastic body: 9 in. – CAP HEIGHT: 2 1/2 in. – CAP DIAMETER: 1 7/8 in. – Pre-Drilled Hole Size Requirement: 1 1/2 in. AIR GAP KIT includes durable ABS plastic body and solid brass cover for a lifetime of reliable performance – SOLID BRASS COVER offers superior durability and a high-end appearance CODE COMPLIANCE: Air gaps are required for dishwasher installations by plumbing codes in many states – 1 YEAR WARRANTY: Satisfaction guaranteed with best-in-industry customer support that puts you first CORROSION AND RUST-RESISTANT FINISH: Premium corrosion-resistant finish will not dull or fade over time, comes in a range of colors to complement your kitchen faucet – UNIVERSAL DESIGN compatible with all dishwashers on the market CLEAN LOOK: Cap covers entire air gap body and installs flush to the sink deck or countertop for a clean look