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For any HVAC technician or serious DIY enthusiast, a durable and reliable set of HVAC charging hoses is a vital tool. The NAVAC NH5SC 5-foot hose set is a professional-grade option designed for safety, durability, and ease of use when servicing air conditioning and refrigeration systems. The Ball Valve Advantage The most significant feature of the NH5SC hose set is the integrated ball valve on each hose. With a simple quarter-turn of the metal handle, you can shut off the flow of refrigerant dir …