What is the standard stub-out height for a wall-hung toilet?

The standard stub-out height for a wall-hung toilet is typically set at 7 inches. This height is based on ensuring that the toilet can be connected to the sewer line effectively while considering the optimal comfort and functionality for users. Wall-hung toilets require specific installation heights to maintain proper clearance for plumbing and to accommodate the design of the toilet itself, which may connect through a mounting frame.

For Americans with Disabilities Act (ADA) compliance, adjustments may be made to accommodate users with disabilities. This is where you encounter a higher standard stub-out height, often at 7 1/2 inches, to ensure accessibility. Therefore, while variations exist based on specific design needs or building codes, 7 inches remains the most common standard for conventional installations.

The other height options provided do not conform to standard practices for wall-hung toilets, making 7 inches the most universally accepted height for this application.