Schluter® Concrete Box Out Drain Preparation Posted by Dan Date: October 12, 2016 in: Videos Leave a comment 1122 Views Additional Schluter Video’s: 2 4:35 Commercial Drain Adaptor Installation in Concrete by schlutersystems1 856 views 3 6:01 Residential Drain Adaptor Installation in Concrete by schlutersystems1 2,603 views 4 9:36 Schluter®-KERDI-ST Shower Tray Extension by schlutersystems1 2,000 views