For flexible couplings with seismic requirements, they need to be installed how far from building expansion joints?

For flexible couplings with seismic requirements, it is crucial to maintain a specific distance from building expansion joints to ensure the integrity and functionality of the fire sprinkler system during seismic activity. Installing these couplings 24 inches from expansion joints allows for adequate movement and flexibility within the piping system while accommodating the potential shifts that occur during expansion and contraction of the building structure. This distance helps to prevent undue stress on the couplings and the connections, thereby minimizing the risk of failure in case of seismic events. It ensures that the flexible couplings can properly absorb any seismic forces and accommodate movement without compromising the system's performance or safety. This consideration is essential in fire protection systems where reliability under all circumstances is critical.