Installing a shower drain without a curb, barrier, or threshold creates a seamless look with easy accessibility to the wet area. To achieve an ideal installation, floor heights should be equal between the shower area (wet area), outside the shower (dry area), and next room. Specific conditions will determine what is involved.By pitching a floor in one direction, the possibilities are infinite.- No limitation on tile size or slab material- Can be placed as threshold or curb - Meets ADA requi …