Schluter® KERDI-DRAIN ADAPTOR FLANGE KIT 7-1/2" ABSNot every shower renovation starts from a rough drain stub. Sometimes there's already a drain with a clamping ring, a traditional bonded membrane connection, or another non KERDI flange and you need to convert it to work with the KERDI waterproofing system. That's exactly what the KERDI DRAIN A Adaptor Flange Kit is for. The KERDI DRAIN A adaptor kit equips existing clamping ring type shower drains with a KERDI compatible bonding flange. Instead of