Snappy Trap 1 1/2" All-In-One-Drain Kit for Double Bowl Kitchen Sinks Easy to Install Flexible Design for Any Space Smooth Interior Wont Clog No Leaks Meets UPC-Uniform Plumbing Code -requirements in USA/CAN. Refer to diagram in images for minimum space required under the sink. Quantity Discounts Available for Amazon Business Accounts. <span class="a-text-bold">All-In-One-Kit</span> :1 1/2&#034; P-trap ,13&#034; length hose connectors,1 1/2&#034; flexible wall drain coupling, two 75 elbows, and all connecting accessories. <span class="a-text-bold">Smooth Interior </span>The hose connectors are made with antimicrobial material and have a smooth interior, which eliminates build-up and odor. <span class="a-text-bold">No Leaks </span>Fewer joint connections and soft TPE washers offer a leak free installation that stays leak free for years. <span class="a-text-bold">Plumbing Code Approved </span>Certified to meet the Uniform Plumbing Code in the USA and Canada Enginereed TPE (Thermoplastic Elastometer) washers seal better than more common harder plastic washers. Patented, Ergonomic nuts are easier to hand tigthten vs. regular nuts Smooth interior prevents build up and clogs. Remove the gray cap to connect a 7/8&#034; dishwasher drain hose. ( Dishwasher drain hose can also be left connected to a waste disposal outlet) Leave the gray cap and use it to connect either a 1/4&#034; or 3/8&#034; R/O system drain hose. A minimum of 4&#034; of vertical clearance is required from the bottom of the sink strainer to the center of the pipe entering the wall. If installing to a double bowl sink with different bowl depths, measure from the deeper bowl. A minimum of 2&#034; from the waste disposal outlet to the center of the pipe entering the wall is also required. For a <span class="a-text-bold">floor drain installation</span>, a 90 elbow cemented to the floor drain pipe is required. A marvel adapter cemented to the 90 elbow is helpful but not required. Instructions included with product.