Resideo 40003918-006 Adapter Kit

Professional-grade hydronic repairs require precise components, and the Resideo 40003918-006 Adapter Kit is the industry standard for servicing legacy and current Honeywell V4043 and V8043 Series Zone Valves. This comprehensive hydronic valve repair kit allows technicians to restore pressure vessel integrity without removing the entire valve body from the line, saving significant labor time on the job site. The 40003918-006 (identically cross-referenced as 40003918-006/U) includes a precision-engineered ball and shaft assembly and a rugged adapter plate, ensuring a factory-tight seal against high static head pressures. By addressing leaks or mechanical failures at the shaft, this Resideo OEM replacement part ensures consistent flow control and prevents actuator burnout. Whether you are maintaining a residential manifold or a light commercial zone system, using genuine Honeywell Home parts is essential for maintaining the engineered flow coefficients (Cv) of the original installation.

Key Benefits for Technicians

• Direct OEM Fit: Guaranteed compatibility with Honeywell V4043 and V8043 zone valves, eliminating the guesswork of aftermarket tolerances.
• Minimizes System Downtime: The kit includes a large O-ring and four mounting screws, providing a complete solution for high-temperature hydronic applications.
• Enhanced Sealing Properties: The ball and shaft assembly is manufactured to resist scale buildup, ensuring smooth rotation and reliable closure.
• Labor Efficiency: Designed for rapid installation, allowing the technician to swap internal components while the valve body remains soldered in place.

Common Questions

Is the 40003918-006 compatible with older Honeywell Powerhead models?
Yes, this adapter kit is specifically designed to interface with the V4043 and V8043 series valve bodies, which are the standard for 2-way water valves used in hydronic systems.

Does this kit include the actuator motor?
No, this is a mechanical adapter kit for the valve internals and plate. If the motor has failed, you will need a separate synchronous motor or a complete replacement head.

Can this kit be used to fix a leaking valve shaft?
Absolutely. This kit replaces the o-ring and shaft assembly, which are the primary failure points for external leaks in these series.

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.