Which of the following are permitted fittings for concealed locations?

In the context of permitted fittings for concealed locations, the appropriate selection of fittings is crucial for both functionality and code compliance. Elbows, tees, and couplings are commonly used types of fittings that facilitate the routing and connection of pipes in various configurations, which is essential in concealed applications, such as within walls or under floors.

Elbows allow for directional changes in piping, tees enable branching of the piping system, and couplings create connections between two sections of pipe. These fittings are specifically designed to maintain flow integrity and can be reliably used in hidden installations, ensuring that the system operates effectively without compromising aesthetic or structural considerations.

Other types of fittings, while they may serve specific purposes, may not be as suitable for all concealed applications. For example, fittings like manifolds or adapters are often designated for specific uses and may not be universally permissible in concealed spaces without considering the specific plumbing codes or installation requirements.