Holyoke Fittings 42R-84 Flare Union Body 1/2 X 1/4 Inch

Product Description

The HOLYOKE FITTINGS 42R-84 is a flare union body fitting sized at 1/2 inch by 1/4 inch. Flare union bodies create a removable, leak-resistant connection between two flare-end tubing runs without requiring solder or brazing. This type of fitting is commonly found in refrigeration, HVAC, and gas piping systems where technicians need a mechanical joint that can be broken and remade during service. Licensed HVAC technicians and refrigeration mechanics are the primary installers of this hardware.

The 42R-84 is suited for applications requiring a transition or union between 1/2 inch and 1/4 inch flare connections. Typical use cases include connecting refrigerant line sections, instrument tubing, or gas supply lines in both residential and light commercial systems. The asymmetric port sizing makes it appropriate for reducing or step-down union connections within a flare-type piping arrangement.

Key Features

• Dual-size flare ports: 1/2 inch on one end, 1/4 inch on the other
• Union-style body allows the joint to be disconnected and reconnected without cutting tubing
• Flare-type connection eliminates the need for solder or open flame during assembly
• Compact body design suited for tight equipment enclosures

Compatibility

Designed as an OEM-style replacement or service fitting for HVAC, refrigeration, and gas piping systems using standard flare-type tubing connections in 1/2 inch and 1/4 inch sizes.

Installation Notes

This fitting is typically installed by licensed HVAC technicians or refrigeration mechanics. Before servicing any refrigerant circuit, recover refrigerant in accordance with EPA Section 608 regulations and relieve system pressure. Ensure tubing ends are properly flared using a calibrated flaring tool before tightening flare nuts to the union body. Do not overtighten flare connections, as this can crack the flare seat and cause leaks.

Technical Specifications

• Connection Size: 1/2 inch x 1/4 inch
• Connection Type: Flare union

Standard Information

• Brand: HOLYOKE FITTINGS
• Manufacturer Part Number: 42R-84