The working principle of the flexible coupling is based on its special "toe" design and elastic sealing ring. While allowing the pipeline to move, its internal pressure self-tightening sealing mechanism can ensure that the sealing effect is even stronger after the system is pressurized, maintaining the water tightness at the connection points.
In buildings of specific seismic design categories, the code usually requires that for pipes of a certain diameter (such as ≥2.5 inches), flexible pipe clamps should be used at the top and bottom of the risers, at floor connections, and near building expansion joints to prevent pipe breakage due to structural asynchronous displacement during earthquakes.
