Yellow Jacket HVAC Manifold 42006 Series 41 with 3-1/8" Gauges — Forged Brass, R-22/134a/404a Accuracy

The Yellow Jacket 42006 Series 41 manifold is a heavy-duty HVAC charging and diagnostic manifold with large 3-1/8" color-coded gauges and a forged-brass, full-port body for accurate service on R-22, R-134a and R-404A systems.

This professional-grade manifold set is built for technicians who need precise pressure readings and dependable flow during charging, evacuation, and system diagnosis. It combines oversized, high-visibility gauges with rugged materials and service-ready hose options to speed work on refrigeration and air conditioning systems while minimizing wear and downtime.

How does the 3-1/8" gauge improve on-the-job accuracy?

Large-diameter gauges increase legibility from a distance and provide finer scale resolution for critical charge and diagnosis. The color-coded faces help you read common refrigerant scales quickly under shop or field conditions.

• 3-1/8" polycarbonate crystal for impact resistance and clear view
• Color-coded scales for R-22, R-134a and R-404A to reduce lookup time
• Class 1 (±1%) accuracy to support precise charging and troubleshooting

What construction features make this manifold durable?

Key structural parts are engineered to withstand professional use: the body is forged brass for corrosion resistance and longevity, while the case and internals focus on low wear and reliable sealing. These choices reduce replacement frequency and service interruptions.

• Forged brass body for strength and corrosion resistance
• Sliding double O-ring pistons to minimize wear over repeated cycles
• Long-life nylon seats that resist deformation and leaking

What hose and port specifications support real-world HVAC work?

Some configurations include full-length, color-coded hose assemblies with industry-standard fittings and high burst ratings—designed for safe, efficient flow when charging or evacuating systems. Full-port valves maximize throughput and reduce pressure drop during transfer.

• Includes color-coded 60" plus II hoses on select models for reach and visibility
• Standard 1/4" flare fittings for compatibility with common service connections
• Hoses UL-recognized at 4000 psi (275 bar) burst and 800 psi (55 bar) working pressure
• Full-porting to maximize capacity and flow with minimal restriction

How does the manifold support precision service routines?

The combination of fine-accuracy gauges, full-port brass passages and reliable sealing components helps technicians manage refrigerant charge and accurately interpret system behavior during static and dynamic testing. This aids consistent service results across multiple systems.

• 1% gauge accuracy aids exact charge and performance verification
• Clear, color-coded gauge faces reduce reading errors under varied lighting
• Robust internal components reduce leak points and maintenance needs

Who is this for: The Yellow Jacket 42006 Series 41 manifold is intended for HVACR technicians, refrigeration service professionals, and facilities maintenance teams who require durable tools and highly legible instrumentation for routine charging, evacuation, and troubleshooting on R-22, R-134a and R-404A equipment. It suits anyone who values easy-to-read gauges, long-lasting materials, and hose assemblies rated for demanding shop and field conditions.