Check valve kfa² 3/4" with brass piston model 710-010-20

Check valve kfa² 3/4" with brass piston model 710-010-20 is a one-way non-return valve designed for plumbing and heating systems. The valve features a brass piston sealing element that ensures corrosion resistance and reliable prevention of backflow. Intended for installation in water supply lines, central heating circuits and similar installations, the valve supports steady flow direction and protects systems from reverse flow and pressure-related disturbances.

Advantages

The brass piston provides durable sealing and improved resistance to corrosion compared with non-metallic components, while the compact 3/4" design allows installation in tight spaces. The valve's straightforward mechanical construction ensures low maintenance and consistent performance over time. Materials and design are suitable for potable water and heating media within standard temperature and pressure ranges common for residential and commercial systems.

Suitable for

• Domestic and commercial water supply lines
• Central heating circuits and return lines
• Boiler protection to prevent backflow
• Pumping systems where one-way flow is required
• General plumbing applications requiring corrosion-resistant sealing

Key specifications

• Connection size: 3/4" (female/male depending on installation)
• Sealing element: brass piston
• Function: one-way non-return valve to prevent backflow
• Typical media: potable water, heating water
• Construction: metal body with brass sealing component for corrosion resistance

How to use

Install the check valve in-line with the arrow or flow direction indicated on the body, ensuring the brass piston faces the downstream side. Ensure connections are properly sealed using appropriate thread sealant or tape compatible with potable water systems. Tighten fittings to manufacturer-recommended torque to avoid deformation. After installation, pressurize the system gradually and inspect joints for leaks; verify correct one-way operation by observing flow and absence of reverse flow when the system is off.

Usage recommendations

Regularly inspect the valve during routine maintenance intervals; check for mineral deposits or debris that could inhibit movement of the brass piston. For installations with high sediment content, consider adding a serviceable strainer upstream. Replace the valve if signs of persistent leakage or mechanical sticking occur. Ensure compatibility of materials with system media and operating temperatures.