The GRACO 521975 is a pipe union fitting, typically made from metal (exact material not specified in available documentation), designed to connect sections of pipe within GRACO fluid handling equipment. Its primary function is to facilitate secure, leak-resistant connections in pressurized fluid systems, such as those found in lubrication and maintenance supply units.

Key Features:

• Pipe union fitting
• 1-1/4 in. NPT(F) (as referenced in some GRACO supply systems)
• Compatible with GRACO supply units and systems requiring 1-1/4 in. NPT(F) pipe connections
• Designed for secure, leak-resistant pipe connections
• Facilitates easy assembly and disassembly for maintenance
• Reliable performance in pressurized fluid systems

Applications:
Used in GRACO fluid supply and lubrication systems, including tandem supply units and ram supply units, to connect pipe sections and ensure system integrity under pressure.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance of the fluid handling system.
• Ensure pipe ends are clean and free from debris before installation
• Use appropriate thread sealant or tape for NPT connections to prevent leaks
• Tighten the union fitting securely, but avoid over-tightening to prevent damage to threads
• Inspect the fitting regularly for signs of wear or leakage as part of routine maintenance