Pump unions

This category includes threaded fittings for direct connection to pumps, designed for use in heating, plumbing, and circulation systems. The fittings feature internal threads and union nuts for reliable, leak-free connections. They are suitable for systems operating at temperatures up to +110°C and pressure ratings up to PN 16.

Products such as the IVAR.SC and IVAR.KUC series are commonly used for connecting ball valves, check valves, and suction baskets to pump inlets and outlets. The IVAR.KUC variant includes an integrated ball cap for added convenience during installation and maintenance.

How to choose

• Confirm the connection type: internal thread with union nut (FF) for compatibility with pump ports.
• Verify the size and thread dimensions, such as 1" x 6/4" FF, to match the pump’s inlet or outlet.
• Select the appropriate material—brass CW617N is suitable for high-temperature and corrosion-resistant environments.
• Ensure the fitting is rated for the system’s operating pressure (PN 16) and temperature (+110°C).
• Consider whether an integrated ball cap (IVAR.KUC) is required for maintenance access.

Frequently asked questions

Can these fittings be used for both inlet and outlet connections?
Yes, they are suitable for both pump inlet and outlet ports, provided the thread size and type match.

What is the maximum operating temperature for these fittings?
The maximum operating temperature is +110°C, as specified in the PN 16 rating.

Are these fittings compatible with non-ferrous pump materials?
Yes, brass CW617N is compatible with non-ferrous pump materials and resists galvanic corrosion in mixed-metal systems.