Where should swing joints and unions not be used?

Swing joints and unions are connection types used in piping systems that allow for flexibility and movement. However, their installation in concealed spaces can lead to significant issues. When piping is concealed, any potential leaks or failures associated with swing joints and unions become difficult to detect and address. This lack of accessibility can result in safety hazards, property damage, and complicate maintenance efforts.

In contrast, above ground installations, outdoor settings, or high-pressure systems do not generate the same level of concern regarding concealment. Above ground and outdoor installations provide visibility for monitoring, while high-pressure systems require specialized fittings, but they are still manageable if maintenance is regularly performed. The key issue with concealed piping lies in the hidden nature of potential failures, making the use of swing joints and unions inappropriate in such applications.