Schluter® KERDI-DRAIN-A 5-1/2" Adaptor Flange Kit (10-Pack)Multi unit pricing for tile pros and contractors doing volume shower work. Same KERDI DRAIN A adaptor flange that converts standard clamping ring drains for use with Schluter's full waterproofing system just more of them, at better value. Each flange integrates with the KERDI membrane at the drain transition the critical spot where most shower leaks originate. Schluter's system eliminates that risk when installed correctly. Built for pro workflows: If