Resideo V8043E1012 Valve

The Resideo V8043E1012 is a professional-grade, two-way normally closed zone valve designed for precision hydronic control in closed-loop systems. Built with a rugged brass body and stainless steel stem, this 3/4 inch sweat zone valve features a 3.5 Cv flow capacity and is rated for a 20 PSI maximum close-off pressure. Operating on a 24Vac motorized actuator, it provides reliable on-off control for baseboard radiation, convectors, and other terminal units. The integrated normally open SPST auxiliary switch allows for seamless end-switch signaling to circulators or boiler controllers, ensuring the heat source only fires when the valve is fully positioned. For service efficiency, the V8043E1012 powerhead can be removed or replaced without draining the entire system, and a manual opener lever is included for bypass during power failures. This model is technically identical to the V8043E1012/U, making it a versatile 24V low voltage zone valve for any contractor's service truck.

• Serviceable Design: Complete powerhead and actuator motor can be replaced without breaking plumbing lines or system drainage.
• Quiet Operation: Designed for residential and light commercial use where silent motorized cycling is critical for occupant comfort.
• Manual Override: Built-in manual lever allows for emergency operation during power loss; automatically resets to "auto" once power is restored.
• System Protection: Spring-return mechanism ensures a positive normally closed position, preventing ghost flows and over-pumping.
• Reliable Sealing: Features a rotating Buna-N ball plug and EPDM O-rings for tight shut-off and resistance to common hydronic additives.

Is the V8043E1012 compatible with systems containing high oxygen levels?
No, this valve is engineered specifically for closed-loop hydronic systems. Frequent exposure to fresh, oxygenated makeup water can cause the internal rubber ball plug to deteriorate prematurely.

Can I use this valve with a 120V thermostat?
No, the Resideo V8043E1012 requires a 24V AC power supply. Attempting to use line voltage will result in immediate actuator failure.

Does this valve include a built-in end switch for the boiler?
Yes, it includes an integral SPST auxiliary end switch (4-wire configuration) to signal the boiler or circulator relay to activate once the valve is open.

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.