What is the closest distance from the center of a water closet to a sidewall?

The correct distance from the center of a water closet to a sidewall is 15 inches. This measurement is based on industry standards that ensure adequate room for installation, maintenance, and user comfort. When positioned at least 15 inches from the side wall, it accommodates enough space for door swings, accessibility requirements, and ensures that individuals can use the fixture without feeling cramped. This distance helps maintain a proper functional and aesthetic balance within a bathroom layout. The dimensional standards are in place to meet building codes and to facilitate ease of use, which is particularly important in both residential and commercial settings.