Snappy Trap Special Kit for Double Kitchen Sinks with Limited Vertical Distance between Sink Strainers and Wall Drainpipe All In One Kit-Special Configuration for installations with limited height (1"-5") between sink strainer and wall drainpipe. For clearances above 5" see standard Snappy Trap kit ASIN B00I2XQ56U. Prevents having to lower the wall drainpipe to install plumbing for kitchen sinks in remodeling projects. Easy To Install, No tools needed. Adapts to installations with waste disposals that meet the min. 2" height requirement (see diagram) In installations with a dishwasher , drain hose can only connect to a waste disposal.