Resideo V8043B1019 Valve

The Resideo V8043B1019 is a heavy-duty, 2-way normally open zone valve designed for precision flow control in closed-loop hydronic heating systems. Engineered with a 1/2" sweat connection, this motorized valve utilizes a 24VAC spring return actuator to ensure the valve reverts to its open position during power loss or thermostat signal interruption. Built for long-term field reliability, the unit features a forged brass body, a stainless steel stem, and a high-temperature EPDM rubber plug. With a 3.5 Cv flow capacity and a 20 PSI maximum close-off pressure, the V8043B1019 provides efficient circulation management while minimizing pressure drop across the loop. The low voltage actuator includes 18-inch lead wires for straightforward wiring into a zone valve controller or transformer, making it a standard choice for contractors managing multi-zone residential or light commercial boiler applications.

• High Close-Off Rating: Rated for up to 20 PSI close-off, preventing leakage and ghost flow in high-head pump systems.
• Quick Fit Design: The actuator can be replaced without breaking the plumbing line, reducing downtime during service calls.
• Corrosion Resistance: Stainless steel stem and brass seat construction provide excellent durability in treated water systems.
• Fail-Safe Operation: Normally open (N.O.) configuration ensures heat delivery continues if the control circuit fails.
• Linear Flow Characteristic: Optimized for consistent temperature control and reduced water hammer during cycling.

Is the V8043B1019 compatible with glycol systems?
Yes, this valve is designed for use in hydronic systems containing water or aqueous propylene glycol solutions up to a 50% concentration.

Can I install this valve in a vertical pipe run?
This sweat zone valve can be installed in horizontal or vertical piping. However, the actuator must never be positioned below the horizontal centerline of the pipe to prevent moisture accumulation.

How do I wire this to a 24V transformer?
The valve utilizes 18-inch leads. Connect the two yellow leads to the 24VAC power source and the thermostat or integrated zone control board terminals.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.