Watts A-319 Ander-Lign Brass Compression Coupling

Description:

The Watts A-319 Ander-Lign Compression Coupling is a 5/8 inch OD x 1/2 inch FIP brass compression adapter with insert designed to connect copper, brass, aluminum, and plastic tubing to female pipe thread connections in water, air, oil, and fluid transfer systems. Commonly installed in plumbing systems, water treatment equipment, beverage dispensing systems, irrigation networks, HVAC equipment, instrumentation lines, and industrial fluid handling applications. Maintenance technicians, plumbing contractors, OEMs, and system integrators use this fitting for system repairs, tubing-to-pipe transitions, retrofit projects, and new installations requiring secure, leak-resistant connections.

Applications:

The Watts A-319 Ander-Lign Compression Coupling is widely used in commercial plumbing systems, water filtration equipment, beverage dispensing installations, ice makers, water softeners, irrigation systems, pneumatic lines, instrumentation systems, HVAC equipment, manufacturing facilities, laboratory systems, OEM assemblies, and industrial process applications. The Ander-Lign design provides 360-degree compression around the tubing for a secure seal while the included brass insert improves tubing support and connection integrity. It is commonly specified in applications requiring reliable transitions between tubing and threaded pipe connections while maintaining long-term leak-free performance in water, air, oil, grease, and compatible fluid systems.

Technical Specifications:

• Manufacturer Part Number (MPN): A-319
• Brand: Watts
• Product Type: Ander-Lign Compression Coupling Adapter
• Connection Size 1: 5/8 in. OD Compression
• Connection Size 2: 1/2 in. FIP (Female Iron Pipe)
• Connection Type: Compression x Female NPT
• Material: Brass
• Insert Included: Yes
• Fitting Style: Adapter Coupling
• Ander-Lign Design: 360° Compression Seal
• Compatible Tubing: Copper, Brass, Aluminum, and Plastic Tubing
• Service Media: Water, Air, Oil, Grease, Vacuum, and Compatible Fluids
• Maximum Operating Temperature: 250°F
• Minimum Operating Temperature: -65°F
• Thread Size: 13/16-18 Compression Thread
• Installation Type: Inline Tubing-to-Threaded Connection
• Application: Plumbing and Fluid Transfer Systems
• Corrosion Resistant: Yes
• Function: Tubing-to-Pipe Connection and Adaptation
• OEM Replacement Part: Yes

Common Replacements:

• Watts A-318 Ander-Lign 
• Anderson Metals 750066-1008 
• Sioux Chief 909 Series Ander-Lign