Are unions permitted to be concealed behind a wall?

The correct answer is that unions are permitted to be concealed behind a wall under certain circumstances. In HVACR systems, unions are connectors that allow for the joining of two pipes, and they play a critical role in facilitating maintenance and repairs.

While unions can technically be installed behind walls in certain designs, this is typically subject to codes and regulations that emphasize safety and accessibility. If a union is concealed, it should still allow for sufficient access for future maintenance or inspections. For example, if a wall is built over the union, there must be the intention of providing access through an access panel or similar means to ensure that the union can be serviced without needing extensive demolition.

In practice, the acceptability of concealing unions often depends on local building codes, the specific installation guidelines of the equipment being used, and best practices within the industry. This ensures that safety is maintained and that technicians can perform necessary repairs or replacements without undue difficulty.