Lennox 18Z76 - Harris 15620F1 Stay-Silv 15 PhosCopper Brazing Alloy, .050 x 1/8 x 20 in., 28 Stick Tube

 

Lennox 18Z76 – Harris 15620F1 Stay-Silv 15 PhosCopper Brazing Alloy is a high-performance copper-phosphorus brazing alloy engineered for reliable, flux-free brazing of copper-to-copper joints in HVAC and refrigeration systems. This alloy is widely trusted by professional technicians for its excellent flow characteristics, strong joint integrity, and consistent performance in both residential and commercial applications.

Stay-Silv 15 contains 15 percent silver, providing enhanced ductility and superior capillary action compared to standard PhosCopper alloys. It is designed for use on copper tubing, fittings, and components commonly found in air conditioning, heat pump, and refrigeration equipment. When used on copper-to-copper joints, no external flux is required, helping reduce installation time and minimize contamination inside the system.

Each tube includes 28 precision-sized brazing sticks measuring .050 inch x 1/8 inch x 20 inches, offering clean handling, uniform melting, and controlled alloy deposition. The alloy produces smooth, leak-resistant joints that withstand vibration, pressure, and thermal cycling, making it ideal for critical HVAC service and installation work.

This product corresponds to Lennox part number 18Z76 and Harris part number 15620F1 and meets industry standards for quality and consistency. It is an excellent choice for contractors seeking dependable brazing materials for copper line sets, coils, and refrigeration piping.

 

Key applications include HVAC copper line brazing, refrigeration system repairs, air conditioning installations, and heat pump service work.

 

Manufacturer: Harris Products Group
Compatible systems: Residential and commercial HVAC and refrigeration equipment
Material type: PhosCopper silver brazing alloy
Silver content: 15 percent
Stick size: .050 in. x 1/8 in. x 20 in.
Quantity: 28 sticks per tube
Flux requirement: Not required for copper-to-copper joints
Country of origin: USA

 

This brazing alloy is designed for professional use and delivers long-lasting joint strength, clean flow, and consistent results in demanding HVAC environments.