A flexible connector is a short hose or corrugated metal tube that joins rigid piping to equipment, allowing minor movement and vibration isolation. These connectors protect equipment connections from stress caused by thermal expansion, vibration, and system settling.
Technical Details
Flexible connectors for water lines measure typically 6 to 24 inches long and accommodate 0.5 to 1 inch of axial movement. Braided stainless steel connectors handle pressures to 500 PSI, exceeding typical system requirements. They reduce vibration transmission by 80 percent compared to rigid connections. Most HVAC codes require flexible connectors within 12 inches of pump discharge and equipment inlet/outlet ports.
Applications
Connectors isolate boilers, chillers, water heaters, and circulating pumps from building structure vibration. They prevent stress corrosion cracking at fixed connection points and reduce acoustic transmission through building envelope.
Practical Significance
Proper connector selection extends equipment life and reduces noise complaints. They must be sized for the specific pipe diameter and system pressure rating.