A mounting assembly configured to adjustably couple a toilet to a mounting surface. The mounting assembly includes a support member configured to mount to the mounting surface; a clamping member rotatably coupled to the support member at a pivot; and an adjusting member extending through an opening in the support member and engaging the clamping member. An adjustment of the adjusting member is configured to pivot the clamping member relative to the support member to adjust a first load between the adjusting member and the support member and a second load between the adjusting member and the toilet.