Non-return valve kfa² 6/4" with brass poppet model 710-010-40

Non-return valve kfa² 6/4" with brass poppet model 710-010-40 is a check valve designed to allow one-way flow and prevent backflow in plumbing and heating systems. The valve features a brass internal poppet that offers corrosion resistance where metallic components are required, and a 6/4" connection size suitable for standard pipe fittings. It is intended for installations where reliable prevention of reverse flow is necessary to protect pumps, piping networks, and system components.

Advantages

The brass poppet provides durable performance and improved resistance to corrosion compared with non-metallic internals. The valve’s straightforward mechanical design ensures immediate sealing in reverse flow conditions, reducing the risk of water hammer and system contamination. Its 6/4" connection fits common plumbing sizes, facilitating quick installation and compatibility with existing pipes and fittings.

Suitable for

• Domestic and commercial hot and cold water circuits
• Heating systems, including boiler and radiator loops
• Pump discharge lines to prevent backflow into the pump
• Circulation loops and closed fluid circuits

Key specifications

• Connection size: 6/4" (suitable for compatible plumbing fittings)
• Internal poppet material: brass for corrosion resistance
• Function: one-way check valve to prevent reverse flow
• Application: potable water and heating system use where brass internals are acceptable

How to use

Install the valve in the flow line with the arrow or flow direction marking pointing in the direction of desired fluid movement. Ensure threaded or fitted connections are tightened to the manufacturer’s recommended torque and sealed with appropriate thread sealant or tape where required. Verify system pressure and temperature limits are compatible with the valve’s material and installation environment before commissioning. After installation, run the system and check for proper operation and absence of leaks.

Usage recommendations

Use the valve in systems where brass internals are suitable for the conveyed fluid; avoid use with aggressive chemicals incompatible with brass. Periodically inspect for leaks and debris that might prevent full closure. If sediment-prone water is present, consider installing strainers or filters upstream to protect the poppet and maintain reliable sealing.