JB K1-1 3/4" NPS x 1/4" Male Flare Drum Adapter

The JB K1-1 Drum Adapter is an essential fitting for technicians managing high-volume refrigerant transfer from large cylinders. This heavy-duty refrigerant tank adapter features a 3/4" NPS female connection designed to mate securely with standard drum cylinders, transitioning to a 1/4" male flare (SAE) output. Engineered for professional HVACR environments, the K1-1 is machined from high-tensile strength brass (65% copper, 35% zinc) at the JB Industries facility in Aurora, Illinois. This domestic manufacturing ensures superior corrosion resistance and structural integrity compared to low-quality imports. The adapter includes a resilient fiber gasket (K1-C style) to maintain a leak-proof seal during refrigerant recovery and charging. With a robust 3000 psi pressure rating and a 4:1 safety factor, it provides reliable performance under vacuum or high-pressure conditions. This HVAC drum adapter is compatible with various tube materials, including copper, aluminum, and steel, making it a versatile tool for any contractor's manifold kit.

• Durable Brass Construction: Machined from premium C360/C370 brass for maximum durability and fatigue resistance in the field.
• High Pressure Performance: Rated for working pressures up to 3000 psi, ensuring safety during high-pressure refrigerant transfers.
• Leak-Proof Interface: Includes a high-quality drum adapter gasket that ensures a positive seal on NPS threads.
• Industry Compliance: Conforms to strict SAE, ASA, and AHRI standards for refrigeration, hydraulic, and marine service.
• Vibration Resistance: Designed as a "make and break" fitting with excellent resistance to mechanical vibration during system operation.

What is the difference between NPS and NPT for this adapter?
The JB K1-1 uses 3/4" NPS (National Pipe Straight) threads, which are standard for refrigerant drum cylinders. Unlike tapered NPT threads, NPS threads rely on the included fiber gasket for a mechanical seal rather than thread deformation.

Is this adapter compatible with R-410A systems?
Yes, the 1/4" male flare connection and the high-pressure rating make it suitable for use with various refrigerants, including R-410A, provided the system uses standard 1/4" SAE charging hoses.

How do I ensure a leak-free connection on the drum side?
Always verify that the fiber washer is seated correctly within the 3/4" NPS female end. JB recommends tightening the fitting 2-1/2 turns past hand-tight to ensure the gasket compresses sufficiently against the cylinder face.

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.