YELLOW JACKET: HVAC Supplies and HVAC Products / Ritchie Engineering Co. YELLOW JACKET® manufactures HVAC supply products, our products include gauges, hoses, adapters, recovery equipment, gauges & more. All products are made in the USA. YELLOW JACKET is the leading manufacturer of HVAC products, tools, and refrigeration supplies. Products include gauges, hoses, adaptors, recovery equipment, gauges & more. WARNING: These products contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.