Lennox 17W79 Service Valve

The Lennox 17W79 Service Valve is a critical HVAC refrigeration component designed for precise flow control and system isolation during routine maintenance or emergency repairs. This 7/8" ODF sweat connection valve features a 45-degree angled port, providing superior access in tight cabinet configurations common in Lennox commercial rooftop units and residential split systems. Engineered for high-pressure R-410A refrigerant environments, this brass service valve ensures a leak-proof seal and reliable seating under thermal stress. For contractors performing a compressor replacement or evaporator coil repair, the 17W79 offers the robust construction required to maintain system integrity. The sweat-to-sweat fitting simplifies brazing procedures, while the internal stem design allows for fine-tuned refrigerant management. Integrating this OEM Lennox replacement part ensures full compatibility with existing line sets and eliminates the vibration issues associated with inferior aftermarket fittings.

• Optimized Access: The 45-degree orientation allows for easier gauge manifold attachment in confined spaces.
• High-Pressure Rating: Specifically designed to handle the operating pressures of modern HP and AC units.
• Durable Brass Construction: Resists corrosion and stands up to high-heat brazing for a secure, permanent seal.
• Exact OEM Fit: Drop-in replacement for Lennox part 17W79, ensuring proper flow rates and port alignment.

What is the connection size for the Lennox 17W79?
This valve features a 7/8" ODF sweat connection, standard for many large-tonnage residential and light commercial liquid or suction lines.

Does this valve support R-22 systems?
While designed for R-410A pressures, the materials are compatible with most standard refrigerants and oils used in Lennox HVAC systems.

Can the internal valve core be replaced?
Yes, the internal architecture allows for standard core replacement should the seal become compromised over time.

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.