Save on the Delta 81T231BTA-20-38 Commercial Chrome H2Optics Exposed Flush Valve. Delta's Line of Commercial Products is an industry leader in Bathroom Faucets, Shower Fixtures, and Bathroom Accessories. The large line of Commercial Grade products are designed to withstand everyday wear and tear and last for years to come. These products are ideal for hospitals, schools, and other high-traffic applications. This Flush Valve features a battery-powered design with an H2Optics Sensor. This Automatic Flush Valve feature s durable brass constructed body with a Chrome finish.