Double Shut-off Heater Valve - Angled - Invena

It means the valve has two separate sealing points that can be closed independently. This allows you to isolate a specific component (like a heater) from both its water inlet and outlet, preventing flow and allowing for safe maintenance without draining the entire heating system.

The valve has a 3/4" Male BSP thread. BSP (British Standard Pipe) is a common standard for pipe fittings.

It is designed for hydronic (water-based) heating systems, such as those using radiators or boilers. It is not suitable for gas lines or steam systems.

The valve can withstand a maximum working temperature of 110°C (230°F) and a maximum working pressure of 1.0 MPa (10 bar).

Installation involves draining the system, applying thread sealant, and screwing the valve into the 3/4" female connection on the heater. You then connect your pipework to the valve's outlet. Basic plumbing knowledge is recommended.

The valve is constructed from nickel-plated brass, offering good durability and resistance to corrosion.

While designed for heating systems which primarily use hot water, it can technically be used on cold water lines within its temperature and pressure limits. However, its primary application is in heating circuits.

Check the thread sealant. If insufficient, drain the system, remove the valve, reapply sealant, and reinstall securely.

The valve may have been inactive for a long time. Gently attempt to operate it. If it remains stiff, ensure the system is depressurized, then try applying a small amount of penetrating lubricant to the stem. Avoid forcing it excessively.

This can indicate internal seal wear. It may be necessary to replace the valve. Ensure both shut-off points are fully closed.

Verify that the heater connection is indeed a 3/4" Female BSP. If it's a different thread size or type (e.g., NPT), an appropriate adapter will be required. Ensure you are using the correct Invena valve model for your setup.