Resideo 40003918-007 Adapter Kit

For veteran HVAC contractors, the Resideo 40003918-007 Adapter Kit (also cataloged as 40003918-007/U) is a critical component for retrofitting and maintaining 3-way diverting valves. This comprehensive zone valve conversion kit is engineered for use with V4044 and V8044 series valves, allowing for a seamless transition from old-style powerheads to modern, replaceable models without the need to drain down the system. This significantly reduces labor time and prevents system contamination during hydronic service calls. The kit includes a precision-machined brass adapter plate, a durable ball and shaft assembly, a high-temperature large O-ring, and four mounting screws for a secure, leak-proof installation. By upgrading to the 40003918-007 adapter kit, you ensure long-term serviceability for hydronic heating systems and small bore central heating applications. Its robust design is built to handle the mechanical demands of two-position diverting control, maintaining system efficiency and preventing unnecessary valve body replacements.

Key Benefits:

• Compatible with V4044 and V8044 3-way diverting valves for reliable port-to-port flow control.
• Eliminates the need for hydronic system drainage during powerhead replacement, saving hours on the job site.
• Upgrades legacy valve bodies to support current Honeywell/Resideo powerheads, extending the life of existing infrastructure.
• Complete repair kit includes the essential ball and shaft assembly and large O-ring to restore factory sealing performance.

Common Questions:

• Is the 40003918-007/U model different from the 40003918-007? No, the "U" suffix simply denotes the universal packaging, but the internal components and specifications are identical.
• Can I use this for 2-way zone valves? No, this kit is specifically designed for 3-way diverting valves. For 2-way hydronic valves, you should utilize the 40003918-006 kit.
• Will this work for chilled water applications? Per manufacturer specifications, these diverting valves and kits are intended for heating applications and are not rated for chilled water use where condensation may occur.

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.